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 TEST - F.S. BROADBAND 25W RF AMP 
i am selling a broadband 25 watt linear amplifier that requires only a Zero dBm (1 Milliwatt) input to achieve full power out with a.bandwidth from 10 to 90 MHz CW carrier.
This 2-stage, class B linear MOSFET amplifier was designed as a highly linear amplifier by an OEM company for medical imaging. It is re-packaged in a 19 inch rack mount unit that contains needed power supplies, a fan and input attenuator. All you need is a good signal source (or tracking generator) and a 50 ohm load and your ready to go. Great for testing RF filters and power tubes,or maybe for QRP operation.
I am asking $200 plus shipping to lower 48 states or local pick-up and save the shipping cost. Copy of schematic is included.
I accept cash, check or Postal Money Order.
More pictures or information by request, via eMail thru this ad on QTH.COM.
Thanks for reading my offer.
- Listing #1741884 - Submitted on 09/03/25 by Callsign K9AU - IP: 45-250-182-166.mobile.uscc.com
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 RADIOANQ - For sale: Isolation transformer
- For Sale: Like new Isolation transformer. Made in USA, 3 selectable input voltages, Female receptacle. Perfect for connected to a hot chassis radio or the output of a variac to get isolation from AC line.
Not Chinese junk. Weighs about 14-15 pounds. John W3AYS $50. Can ship large USPS flat rate for about $20.
- Listing #1741756 - Submitted on 09/02/25 by Callsign W3AYS, Modified on 09/03/25 - IP: syn-072-191-163-115.res.spectrum.com
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- RADIOANQ - Vintage Panel Meters, Capacitor, Coils
- FOR SALE: Vintage Meters, Variable Capacitors & Coils. All items are in very good condition. Meters & variable capacitors $25 each. Includes FedEx or USPS shipping w/ tracking. Discount for multiple orders.
Volt Meters:
0 – 15 AC volts The Hickok Electrical Instrument Co.
00 – 150 Dental X-ray Wappler Electrical Co
0 – 250 AC volts Westinghouse [zero screw defect]
0 – 300 DC volts Jewell Electrical Co
Milliampere Meters (DC) from Westinghouse
0 – 2, 0 – 15, 0 – 500
0 – 35/0 – 350 DC Hickok Electric Co
0 – 30 ma/10,000 – zero ohms Westinghouse
Coils and Variable Capacitors
James Millen MFG Co: 43022 inductor air wound, 20 meter, 24 watt, end link coil $25
James Millen MFG Co: 46100 Quartz Coil Forms; 1 5/16” dia x 1 7/8”; four for $20
Hammarlund Coil Form SWF-5; 5-pin; $10
Hammarlund: MTC-20-B transmitter tuning variable capacitor $25
Allen – Cardwell: MT-20-GD transmitter tuning variable capacitor $25
- Listing #1741883 - Submitted on 09/03/25 by Callsign NONE - IP: syn-097-081-038-086.res.spectrum.com
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- RADIOANQ - B & W new Ant switch
- B & W 550-A 5 position new in original box with instructions antenna switch with knob. New in box but sold for parts. $45 picked up in El Paso, TX or shipped USPS to lower 48 for $60 W3AYS John
- Listing #1741751 - Submitted on 09/02/25 by Callsign W3AYS, Modified on 09/03/25 - IP: syn-072-191-163-115.res.spectrum.com
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- RADIOHF - For Sale: Drake R8 with VHF Converter
- I am selling my Drake R8 receiver with the optional VHF converter. It is in very good cosmetic and electrical condition. The converter is the improved 2nd generation.
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This radio is very clean, with no signs or smell of smoke. Picture has a few reflections. The front panel looks like new.
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In addition to the VHF Converter, the original Drake R8 Owner’s Manual and shipping box are included. A pdf copy of the Service Manual can be provided via email.
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$650 plus shipping. I will consider splitting them up.
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Please email for additional info, pictures, and questions.
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73
Paul, N9PL
- Listing #1741608 - Submitted on 09/01/25 by Callsign N9PL, Modified on 09/03/25 - IP: syn-045-037-211-083.res.spectrum.com
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- RADIOANQ - New Dietzen slide rule
- For sale: New in box with warranty, case, conversion tables, Dietzen 1734 Decimal Trig microglide slide rule. Finest quality, Used to send a man to the moon and back! W3AYS John
$50 picked up in El Paso, TX or $50 shipped USPS to lower 48.
- Listing #1741753 - Submitted on 09/02/25 by Callsign W3AYS, Modified on 09/03/25 - IP: syn-072-191-163-115.res.spectrum.com
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- TUBES - FS: Power Amplifier and Rectifier Tubes
- FOR SALE: Power Amplifier and Rectifier Tubes
6L6GA Jan-CHS (7 pin) Sylvania $20 each plus shipping; four for $75 w/ $15 shipping included
866 (4 pin) Taylor Custom Tubes made is USA Set of two $50 w/ $15 shipping included
- Listing #1741882 - Submitted on 09/03/25 by Callsign NONE - IP: syn-097-081-038-086.res.spectrum.com
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- RADIOHF - FOR SALE: YAESU FTDX-5000 MP
- Testing the waters here: I have a nice Yaesu FTDX-5000 MP that I'd like to sell. It is in great condition except for one dim OLED. And I have 3 brand new OLED's from Yaesu that I will include with the sale to the new owner. The MP version includes the SM-5000 speaker set and the spectrum scope. It also includes 4 roofing filters, a built in power supply and 200 watts of output power. I have the original boxes, manual, & hand mic. The radio works perfectly as it should. I'm asking $1800 for the rig. No shipping at this time, but local pick up is fine or I will meet within a practical and agreed upon distance. I could deliver it to the Butler, Pa. Ham Fest Sunday Sept. 7th. This big radio would be super expensive to ship and risky as well. Please EMAIL offers or questions. PayPal or USPS money orders are fine...as well as cash...hihi.
Thanks & 73...Butch...K3AFR
- Listing #1741710 - Submitted on 09/01/25 by Callsign K3AFR, Modified on 09/03/25 - IP: dynamic-acs-24-144-186-183.zoominternet.net
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- RADIOHF - Icom IC-746 $475 Shipped
- Bright/clear display and 100 watts on HF and VHF! Comes with an Icom Hand Mic and Power Cable. Power supply in the picture is not for sale. $475 Shipped (CONUS only). I accept personal check, USPS money order or PayPal (add 3%). Thanks for looking and 73
- Listing #1741652 - Submitted on 09/01/25 by Callsign N0KMR, Modified on 09/03/25 - IP: 172.58.11.80
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- RADIOHF - ELECRAFT K3 and K3S -K3EXREF Freq Lock
- ELECRAFT K3 and K3S -K3EXREF Frequency Lock Option !!
Often asked for.
$199 Delivered - check, Zelle, PP FF ok.
If you want to add this hard to get option to your K3 or K3S,this could be for you.
Pretty simple to install.
Pulled from a working K3.
I will be listing Elecraft option boards and 8 K3 radios very soon !
Please see pictures of everything included.
I can be reached through email if you have questions about this unit.
Larry K6RO
- Listing #1741839 - Submitted on 09/02/25 by Callsign K6RO, Modified on 09/03/25 - IP: syn-067-253-101-060.res.spectrum.com
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