Aerials and antennas

-Build your own portable, mobile and fixed antenna designs-- ARRL's VHF/UHF Antenna Classics includes antenna project articles gathered from the 1983 to 2003 issues of QST. Designs include ground planes, J-poles, mobile antennas, Yagis and more. Authors include well-known antenna designers such as L.B. Cebik, W4RNL, Dick Stroud, W9SR and Steve Powlishen, K1FO. VHF and UHF antennas are among the smallest and often easiest antennas to build. Many of the projects included in this book require inexpensive parts which you can find at most hardware stores. Build a better antenna for your hand-held radio. Construct a 2-meter Yagi that will rival similar commercial antennas. Build a dual-band vertical for 146 and 445-MHz. The results will be rewarding! Slight sun damage to spine of book, other than that book is in good condition We Consider and Accept Best Offers From Our Customers Shipping from France with 100% Customer Satisfaction

5.8 GHz Dual Patch antenna by WA5VJB - this listing is for individual antennas WITH connector attached. This compact 5800 MHz quad patch antenna provides high gain across the narrow frequencies very commonly used in wireless systems. This is a wifi antenna that can run data links, dish feeds, wireless systems, ATVs, repeaters and beacons. It has 8-9 dBi gain. This 5.8 GHz antenna performs well for drone FPV applications. Each antenna weighs less than an ounce. They are 1" tall, 2.25" across and a fraction of an inch thick. I also sell 5.8 GHz quad patch antennas by WA5VJB without any connecting cables. See my other listings. Free shipping for U.S. customers.

Telescopic Antennas Replacement BNC Connector Rod communication Antenna ZH 100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 22-nov.-19 à 15:35:25 Paris, le vendeur a ajouté les informations suivantes:

5pcs 90 Degrees Male TV Plug Jack for Antennas TV RF Coaxial Adapter ConnectorZH 100% Brand New and High Quality ! Type: 9.5mm Male TV Antenna Connector Material:Metal, plastic Size:30 x 28mm (L x B) Color:As Pictures Package Included:5Pcs

Telescopic Antennas Replacement Bnc Connector Rod Communication Antenna RK a.imagelink {color:#1b0562;} a:hover.imagelink {color:#1b0562;} a:visited.imagelink {color:#666666;} a.imagelink img.auctionimage { border: 2px solid #1b0562; } a:visited.imagelink img.auctionimage { border: 2px solid #666666; } 100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 07-févr.-20 à 08:25:05 Paris, le vendeur a ajouté les informations suivantes:

100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 14-nov.-19 à 13:21:01 Paris, le vendeur a ajouté les informations suivantes:

100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 03-avr.-20 à 11:30:04 Paris, le vendeur a ajouté les informations suivantes:

100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 14-avr.-20 à 18:06:18 Paris, le vendeur a ajouté les informations suivantes:

100% Brand New and High Quality ! Section: 5 sections Total length (body + Base): approx. 5.55 inches Full extended length (body + base): approx. 16.6 inches Color:As Pictures Package Included:1 Pcs  Le 14-avr.-20 à 06:10:22 Paris, le vendeur a ajouté les informations suivantes:

A Vendre; ensemble 1x MFJ-993B + 1x MFJ-5124Y + 1x Alimenation 220/12V 2A et tous les cordons, MFJ-993B 1.8-30MHz Automatic Antenna Tuner 300 Watts SSB / 150 Watts CW Comme neuf utilisé moins de 10 fois, doublon ne me sert pas donc je m'en sépare. En parfait état de fonctionnement et cosmétique, juste quelques griffures sur le dessous voir photos. Facture fournie du 19/09/2020. Soit 25% du prix  de l'ensemble neuf. description: Automatically tunes unbalanced/balanced antennas...Ultra fast... New 20,000 memories... Antenna Switch... Efficient L-network... Select 300 Watts (6-1600 Ohms) or 150 Watts (6-3200 Ohms)... 1.8-30 MHz... 4:1 current balun... Cross-Needle and Digital SWR/Wattmeter... Audio SWR meter... Backlit LCD... Remote control port... Radio interface... World's First dual power level 300/150 Watts SSB/CW Tuner Select 300 Watt SSB/CW power level and match 6-1600 Ohm antennas Or... select 150 Watt SSB/CW power level and match extra wide-range 6-3200 Ohms! The MFJ-993B IntelliTuner lets you tune any antenna automatically balanced or unbalanced -- ultra fast. It's a comprehensive automatic antenna tuning center complete with SWR/Wattmeter, antenna switch for two antennas and 4:1 current balun for balanced lines. MFJ's exclusive IntelliTuner, Adaptive Search and InstantRecall algorithms give you ultra fast automatic tuning with over 20,000 VirtualAntenna Memories. You get a highly efficient L-network, 6-1600 ohm matching at 300 Watts SSB/CW or extra-wide 6-3200 Ohm matching at 150Watts SSB/CW, 1.8-30 MHz coverage, Cross-Needle and digital meters, audio SWR meter, backlit LCD, remote control port, radio interface, heavy-duty 16 amp/1000V relays. It learns while you're having fun As you're ragchewing, contesting or DXing, your MFJ-993B is learning! When you transmit, the MFJ-993B automatically tunes for minimum SWR and remembers your frequency and tuner settings. The next time you operate on that frequency and antenna, these tuner settings are instantly restored and you're ready to operate in milliseconds! MFJ new VirtualAntenna Memory system gives you 4 antenna memory banks for each of 2 antenna connectors. Select up to 4 antennas on each antenna connector. Each antenna has 2500 memories, 20,000 total. Intelligent ultra fast tuning MFJ's InstantRecallTM first checks its memory to see if you have operated this frequency before. If so, tuning is instantaneous and you're ready to operate. If not, MFJ's IntelliTuner algorithm - - based on MFJ's famous SWR Analyzer technology - - kicks in. It measures the complex impedance of your antenna. Next, it calculates the components it needs and instantly snaps them in. Then, it fine tunes to minimize SWR -- you're ready to operate. It's all done in a fraction of a second. When the impedance is within its measurement range, the MFJ-993B is the fastest automatic antenna tuner in the world. If it can't accurately determine impedance, MFJ's AdaptiveSearch algorithm goes into action. Frequency is measured and relevant components values are determined. Only those values are searched for ultra-fast tuning. For even faster searches, you can set the target SWR to 2 (settable 1.0-2.0). You can manually tune when you can't transmit (for listening out of ham bands). Cross Needle and Digital SWR/Watt Meters Lighted Cross-Needle and digital meters lets you accurately read SWR, forward and reflected power at a glance. An audio SWR meter lets you hear the tuned SWR when you can't see/read meters. Turn on a highly visible, instant response SWR LCD bargraph when you need it. Backlit LCD Display An easy-to-read backlit LCD displays SWR, forward/reflected power, frequency, antenna 1 or 2, L/C tuner values, on/off indicators and other information. The MFJ-993B is a compact 10W x 2¾H x 9D inches.  Requires 12 volts for lamp -   included Remote Control Plug in the MFJ-993RC, remote control and use your tuner elsewhere remotely. MFJ-993B Interface Pre-wired Cables  Allows automatic tuning of your MFJ-991B/993B/994B IntelliTuner through radio. With  MFJ-5124Y YAESU.  Supports FT991A and others With alimentation 220V/12V 2A pour alimenter l'interface -------------------------------------------------------------------------------- Pas d' expedition hors de France; me contacter en préalable. Livraison incluse en France par MondialRelay (donnez par message votre site de relais)

- - - - - - - - - Store category Sign Up Now ! You may also like 5G 4G 3G Cell Phone Signal Booster 7 Bands Mobile Repeater Boosts All Carriers Product Description 【Compatible with All US Networks】- 7 bands booster supports All U.S. Carriers All Signal Type 5G/4G/3G/2G for Verizon, AT&T, T-Mobile, Straight Talk, US Cellular and Sprint etc, works with all cellular devices operating on Band 71, 12/17, 13, 5, 66/4, 2, 30. (600/700/850/1700/1900/2100/2300MHz) 【Better Voice & Data】- Enhances voice, text, data speed signals, enjoy no more dropped calls, better voice quality, faster uploads and downloads to stream videos smoothly. Get rid of expensive monthly internet and home phone land-line fees. Supports multiple users simultaneously. 【Advanced Features & Smart Device】- The booster uses AGC(Automatic Gain Control) function, which can intelligently detect the existing signal strength, and adjust itself for best performance, then reflect its working condition through smart LED touch screen and lights. 【Powerful Antennas & Large Coverage】- Phonetone 7-band 5G booster comes with high gain directional antennas, allow you to point it to the nearest signal tower more accurate and get more signals, expanding the indoor coverage up to 5000sq ft. DIY Installation. 【Excellent Service Guaranteed】- FCC Certified, 30-day money-back guarantee, 3-month free replacement, 5-year manufacturer warranty. Professional Technical Support.     Specification Uplink Downlink Frequency Range Band 71 663 - 698 MHz 617 - 652 MHz   Band 12,17 698 - 716 MHz 728 - 746 MHz   Band 13 776 - 787 MHz 746 - 757 MHz   Band 5 819 - 849 MHz 864 - 894 MHz   Band 2 1850 - 1910MHz 1930 - 1990MHz   Band 66,4 1710 - 1780MHz 2110 - 2180MHz   Band 30 2305 - 2315MHz 2350 - 2360MHz Max. Output power ≤20 dBm Automatic Gain Control ≧20 dB MGC (Step Attenuation) ≧20dB / 1dB step Max.Gain 72dB Impedance 50ohm I /O Port N-Female Dimensions 216mm*157mm*24mm Weight 0.78kg Power Supply Input AC 100~240V 50/60Hz, output DC 5V   Why You Want it? Large Coverage 1. Panel antenna has larger indoor coverage than other antennas. 2. Outdoor Panel antenna can get more accurate signals from signal tower. It's best suited for the weak or moderate external signal strength. 3. Covers up to 5000 square feet. Compatibility 1. Compatible with all carriers all signal type, supports multiple device connections. 2. Once anyone enters coverage, the signal will be automatically enhanced without the need for a manual connection. 3. Antennas are both designed with smaller SMA connectors to facilitate cable laying. Package 1 * 7 Bands Signal Booster 1 * AC Adapter 1 * English User Manual   FAQ Delivery details Terms of sales Payment Contact us FAQ We design, develop, manufacture, market and service signal amplifiers systems for cell phone, with our innovative, dedicated and experienced team. We can provide high quality products and solutions that you want from your amplifier suppliers. Welcome to buy. FAQ 1. What does a mobile phone signal booster include? How does it work? Can I use the signal booster when the outdoor signal has 0 bar? 1) A signal booster kit mainly includes a signal amplifier,an outdoor antenna(with a 10 meters coaxial cable), and an internal antenna(with a 5 meters coaxial cable) etc. 2) Outdoor antenna receives the signal from the base station to transmit to the repeater, the signal is boosted around the place via the indoor antenna to improve the call; It is suitable for transmitting the voice and data of mobile phone, tablet

Antenne télescopique à 7 sections Antenne Radio TV Remplacement Instrument CRD a.imagelink {color:#08010F;} a:hover.imagelink {color:#08010F;} a:visited.imagelink {color:#A0A0A0;} a.imagelink img.auctionimage { border: 2px solid #08010F; } a:visited.imagelink img.auctionimage { border: 2px solid #A0A0A0; } Description 1. Radio, toy, mother machine, walkie-talkie, remote control car, instrument-specific antenna 2. Ideal replacement part for radio equipment, television, car antennas, phone antennas, etc.   Specification 100% brand new and high quality Material:stainless steel Color:as picture Size  : Collapse length:14.5 cm,Expanded length:76.5cm Sections: 7 Sections Function:Ideal replacement part for radio equipment, television, car antennas, Package include: 1pc   Note 1. Since   different computers display colors in different ways, the actual project color may be slightly different from the above image. 2. Due to manual measurement, please allow 1-3 cm to be different. thank you for understanding. -Nous acceptons seulement le paiement Paypal. - acheteurs   internationaux - veuillez   noter: a) les taxes et frais d'importation ne sont pas inclus dans le prix de l'article ou les frais d'expédition.  Ces   charges   sont   la   responsabilité   de   l' acheteur. b) Veuillez vérifier auprès du Bureau de douane de votre pays pour déterminer ce que ces coûts supplémentaires seront avant d'enchérir/acheter. * Nous ne pouvons pas expédier aux cases postales ou aux adresses d'APO/FPO Merci! Description 1. Radio, toy, mother machine, walkie-talkie, remote control car, instrument-specific antenna 2. Ideal replacement part for radio equipment, television, car antennas, phone antennas, etc.   Specification 100% brand new and high quality Material:stainless steel Color:as picture Size  : Collapse length:14.5 cm,Expanded length:76.5cm Sections: 7 Sections Function:Ideal replacement part for radio equipment, television, car antennas, Package include: 1pc   Note 1. Since   different computers display colors in different ways, the actual project color may be slightly different from the above image. 2. Due to manual measurement, please allow 1-3 cm to be different. thank you for understanding. PAYMENT -Nous acceptons seulement le paiement Paypal. - acheteurs   internationaux - veuillez   noter: a) les taxes et frais d'importation ne sont pas inclus dans le prix de l'article ou les frais d'expédition.  Ces   charges   sont   la   responsabilité   de   l' acheteur. b) Veuillez vérifier auprès du Bureau de douane de votre pays pour déterminer ce que ces coûts supplémentaires seront avant d'enchérir/acheter. * Nous ne pouvons pas expédier aux cases postales ou aux adresses d'APO/FPO Merci! SHIPPING Terms of Sale ABOUT US Le 16-juil.-19 à 14:55:11 Paris, le vendeur a ajouté les informations suivantes:

Description 1. Radio, toy, mother machine, walkie-talkie, remote control car, instrument-specific antenna 2. Ideal replacement part for radio equipment, television, car antennas, phone antennas, etc.   Specification 100% brand new and high quality Material:stainless steel Color:as picture Size  : Collapse length:14.5 cm,Expanded length:76.5cm Sections: 7 Sections Function:Ideal replacement part for radio equipment, television, car antennas, Package include: 1pc   Note 1. Since   different computers display colors in different ways, the actual project color may be slightly different from the above image. 2. Due to manual measurement, please allow 1-3 cm to be different. thank you for understanding.   Description 1. Radio, toy, mother machine, walkie-talkie, remote control car, instrument-specific antenna 2. Ideal replacement part for radio equipment, television, car antennas, phone antennas, etc.   Specification 100% brand new and high quality Material:stainless steel Color:as picture Size  : Collapse length:14.5 cm,Expanded length:76.5cm Sections: 7 Sections Function:Ideal replacement part for radio equipment, television, car antennas, Package include: 1pc   Note 1. Since   different computers display colors in different ways, the actual project color may be slightly different from the above image. 2. Due to manual measurement, please allow 1-3 cm to be different. thank you for understanding. Le 12-juil.-19 à 16:33:08 Paris, le vendeur a ajouté les informations suivantes:

LIKE NEW !   A COMPLETE FM Broadcast STATION 88-108Mhz : with FM 30 watts Pilot exciter, with RDS encoder, with Stereo coder, with FM 4 bands audio processor, with 2x Broadband antennas + 2 ways splitter: - BW DSPX = 880 €uros - AZTEC AUDEMAT FMB10 = 170 €uros - RVR PTX30UHT = 340 €uros - 2x Antennas = 290 €uros - Splitter 2 ways = 140 €uros Total initial price = 1820 euros ******************************************************************************************************************************** ALL NEW Never used !  - STEREO CODER and FM audio processor: BW - DSPX (it's not the '' mini '' version) But the great DSPX broadcast processor for FM - Dj's - Mastering...   (I pay this apparatus: 1800 €uros with all taxes) ALL new, never used, with technical notice, software and pdf (free) on the BW compagny site:  for the notice: http://a-bc.co.uk/Misc/Tools/DSPX-FM%20v320%20Manual.pdf Processeur audio FM traitement de son numérique multibandes 4 bandes ==>   https://www.youtube.com/watch?v=oLPv2J8_X1o     or     https://www.youtube.com/watch?v=5IFjZmZlzWo - 4 bandes AGC - limiteur 4 bandes - Clippeur 3 bandes - Connectivité LAN - Stereo Coder (50us or 75 us) - Output MPX 19Khz - Input RDS (with sync pilot) - sortie droite-gauche avec clippeur indépendant - Ethernet RJ45... Like NEW - Just revised and calibrated for 330 €uros by ''AUDEMAT-Bordeaux(France)'' - RDS Encoder: Aztec FMB10/40  Configuration wizard Simulated PS and Radiotext display Dynamic PS data from automation Labeling Command interpreter 19 kHz Synchronization - External, Internal or Automatic Synchronization monitoring Software control of RDS injection level – no trimpots Software adjustment of 57 kHz Phase ASCII Commands to enable or disable the RDS SCA Composite bypass feature in case of failure Superb spectral purity of the RDS signal Like NEW - Because used only 6 months in ''help mode'' - FM 88-108 MHz PLL Exciter transmitter - 0 to 30 watts: RVR - PTX30UHT Like NEW - 2x Broadband antennas for 1kW maxi (Mat Equipment) + 1,2 Kw Splitter 2 ways N/N ------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------ NO DISPUTE - MY EVALUATION FEEDBACK IS MY GUARANTEE France: Paiement par virement uniquement, transport en plusieurs colis. International seller: NO PAYPAL (for no big service taxes) ==>  ONLY: money transfer bank to bank  with IBAN/BIC contact me for the right transport charges, with your country. It's heavy !  transport in 3 solids cardboards.

ESSAYÉ EN FM ET LW OK POUR LES AUTRES BANDES PAS D’ANTENNES APPROPRIÉES Année: 1976-1978? Catégorie: Récepteur de diffusion - ou passé tuner WW2 Semi-conducteurs (le compte est seulement pour des transistors) 34: Superhétérodyne, conversion double / triple; IF / IF 2000/455 kHz bandes onde Diffusion, grande longueur d'onde, morethan 2 x SW, plus FM ou UHF. détails Type de puissance et de tension Ligne / piles (tout type) / 110/220 Volt Haut-parleur aimant permanent (Dynamic Pdyn) Haut-parleur (à bobine mobile) / 4 de pouce de diamètre = 10,2 cm out Power 2 W (qualité inconnue) de Radiomuseum.org Modèle: RF-4800 LBS / DR-48 - Panasonic, Matsushita, matière divers matériaux forme Modèle de table, profil bas (grande taille). Dimensions (LHP) 480 x 200 x 355 mm / 18,9 x 7,9 x 14 pouces notes Couverture LW, BC (MW), SW 1600-30000 kHz, VHF (FM). Dessous de 3000 kHz seule conversion, au-dessus de 3000 kHz à double conversion. Compteur numérique uniquement pour les bandes 2 ondes courtes - 8. Vendu aux États - Unis en tant que RF-4800 celui ci contrairement au DR 48 ne couvre pas le pas LW). Poids net (2,2 lb = 1 kg) 8 kg / 17 lb 9,9 oz (17.621 lb) The Panasonic RF-4800 LBS has been sold in Europe as DR-48, it covers also the longwave band. The DR-48 is a quite bulky desktop receiver with it's dimensions of 48 x 20, x 35,5 cm and it's weight of 8 kg; two metal handles give protection to the front panel, when the set is turned face down - the give the set the aspect of a semiprofessional receiver. The RF-4800 can be powered from 110 / 220 V mains, from a 12 V car battery or eight UM-1 / mono cells accomodated in two battery compartments. At the left side of the frontpanel, You find the big speaker and below the mains switch, the jacks for an external speaker and a cassette recorder at further right the rotary controls for volume, bass, treble and the BFO pitch control. In the middle of the display window at the right, You find the red LED display of the frequency counter active on shortwave bands SW 2 - 7 and the auxiliary dials for long-, mediumwaves, tropical bands (SW 1) and the FM broadcast band at the left and the shortwave bands SW 2 - 7, each 4 MHz wide, at the right. In the middle of the frontpanel the huge main tuning knob is located, it is equipped with a crank and can be set to slow and fast tuning speed by pressing the knob in the centre - this knob will tune the shortwave bands. The frequency display is active on these band segments and the receiver operates as a double conversion receiver. The second smaller tuning knob tunes the long-, mediumwave, SW1 and FM broadcast bands, in these bands, the set operates as single conversion set and the frequency display is not active. The signal strength meter tends to read high, in the RF-4800 it has a white background, this is a possibility to distinguish the set from the RF-4900, the S meter of the successor comes with a black background. Below You find a row of switches: the switch to activate the AFC in FM mode selects between the two AM bandwidths in AM mode, the middle switch activates the noise limiter and the third one the BFO: use the BFO pitch control just below for an optimum BFO note when receiving CW transmissions and for optimum speech reproduction in SSB mode - voices should no sound like mickey mouse. The bandswitch for LW - MW - SW1 - FM and the band segment switch for SW 2 - 7 are located below the right auxilitary frequency dial. The frequency counter can be calibrated from a 5 or 10 MHz time signal and frequency standard transmission from WWV / WWVH or even from another station transmitting exactly on a known frequency. Tune in to "Radio Deutsche" Welle on 6075 kHz and wait for news and station identification, then tune to maximum S meter reading and use the SW 2-7 CAL control to set the frequency display exactly to display 6.075 - with this control not set correctly, the frequency displayed can be 2 - 4 kHz off the actual frequency. Keep in mind, the RF-4800 is no PLL synthesized set. In the right lower part of the front panel, You find the ANT TRIM to match an external antenna, the R.F. gain control. This should be set to maximum position or "DX" as a standard, in case of overloading of the receiver front end due to high signal level conditions in acrowded shortwave broadcast band wit ha long antenna, You can reduce the R.F. gain. In fact, this knob acts more like an attenuator as there is no switch to turn off the AGC (automated gain control) completely. Three more switches activate dial illumination, frequency display and set the S meter to indicate battery power. At the rear face of the DR-48 / RF-4800 LBS, You find the two folding out ferrite antennas for long- and mediumwaves, the international variant comes with only one ferrite antenna. Next to the antenna sockets, there is a PL / SO 239 antenna socket for SW 2 - 7. The DIN socket can be used to feed the DR-48's audio signal to a cassette recorder and also to feed a signal from an external audio source to the receiver, set the switch at the rear to "PHONO" to use the DR-48 as audio amplifier. The operation scheme of the DR-48 is quite straightforward: turn on the set, make sure the RF gain control is turned to the MAX setting, the AM bandwidth to wide and the BFO turned off. The right bandselector should be on SW 2 - 7 and the left on "2" to select the 3 - 7 MHz range, the use the big tuning knob to find the "Deutsche Welle" from Cologne on 6.075 MHz. If the signal peak is one or two kHz higher or lower then 6.075, use the SW 2-7 CAL to adjust the frequency display setting to the correct frequency. Due to it's conventional design as a double conversion receiver with a quite low first I.F. and a frequency counter, the receiver shows a certain frequency drift even after warm up, CW or radioteletype decoding with an automatic decoder and even reception of SSB signals need slight retuning of the set from time to time, automated recordings won't work properly. The skirt selectivity of the two I.F. filter's is mediocre. quite often, You hear an 5 kHz interference whistle from a adjacent channel carrier. As the receiver operates as single conversion set below 3 MHz, You might encounter mirroring or "ghost signals" appearing 900 kHz from the original signal away. As the internal ferrite antennas cannot be switched of, the DR-48 / RF-4800 is not well suited as a longwave / mediumwave DX receiver. Conclusion: the DR-48 / RF-4800 represents the state of the art from the early eighties as desktop receiver with double conversion circuitry connected to a frequency counter, stability, suppression on unwanted signals and selectivity of the I.F. filters is all below the expectations for a shortwave receiver in the 21st century. The DR-48 / RF-4800 looks very impressive and makes a decent secondary or entry level shortwave radio, for real Dxing, You would need a set with better filters, maybe a notch filter and passband tuning and a few memories to compare different frequencies. If You find a DR-48 / RF-4800 for a bargain price, get one, and You might have lot of fun with it. The technical built quality is not superior, so You might encounter some work until the receiver is running properly. In my sets, the wave band and shortwave band switches all did contact poorly and needed cleaning, as well as the AM narrow / wide switch and even the rotary volume and tone controls.