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Display Unit for Elecraft's KPA500: The Digital Display Unit for Elecraft's KPA500

A compact, easy to read KPA500 Digital Display Unit (DDU). It allows the monitoring of five crucial readings all at the same time.

The DDU measures only 4X4X2 with an easy to read 2 line display that can be located at the operating position and the KPA500 located up to 100 feet away.

The DDU is designed with the following features:

Easy to read 2 line display
No USB or serial cable to computer
No com port in Windows to manage
No computer needed
Plug and Play
Simply connect the supplied DC power cable to power supply and PC data jumper cable to the KPA500
Retains all functions of the KPA500 front panel
All displayed info obtained directly from the KPA500

Last 2 Units. Displays are being retired soon.

Newest Hardware and Software. $199 plus $10 shipping.; Listing #1747887 - Submitted on 10/30/25 by Callsign KV5J, Modified on 10/31/25, Web Site: http://www.kv5j.com - IP: 172.59.222.187; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Drake L7 RF deck $700.00 shipped: L7 RF deck. No tubes. No PS. Easy way to get on 160 if you already have an L4 or L4B since it uses the same PS. Restored by Ron WB4HFN prior to my purchase a few years ago. Works perfect. Plug and play. $700.00 shipped UPS ground.; Listing #1747990 - Submitted on 10/31/25 by Callsign KU7I - IP: 50-193-238-138-static.hfc.comcastbusiness.net; Click to Contact -- Send this Ad to a Friend
For Sale: Alpha 89 HF Amplifier: Amplifier has had only limited use. I am the second owner. I am not a aware of any modifications. With just 80 watts of drive this amplifier still easily produces 1.5 kw cw and 2.0 kw PEP on SSB. Tubes are in excellent condition. Variables are clean, no sign of any arcing. Face and cabinet are clean. Always in a smoke free environment. If you're looking for an amplifier that gives just a bit more punch than the other guys, this is the one. It's an Alpha. Asking $2,250. No shipping, it's just too heavy. Pick-up is preferred but I am willing to meet a prospective buyer up to 2 hours from mid-Michigan. Paypal or cash are ok. Sale is final, no returns and no guarantees expressed or implied. Photos of face and interior are available.; Listing #1747792 - Submitted on 10/29/25 by Callsign W8QW, Modified on 10/30/25 - IP: 96-46-15-231.res.trstrm.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE KPA 100 w ATU: KPA 100 with ATU in excellent condition. Serial NR 3480. Original Elecraft boxes and manual. A great amp at a reduced price. $1250.00 including shipping. I take paypal.; Listing #1747931 - Submitted on 10/30/25 by Callsign K2RB - IP: syn-141-126-213-131.res.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Stone Mountain/Lawrenceville Hamfest: I will be somewhere in the boneyard this Saturday 11/1 with:
Dentron MLA2500 w/2 X GI7B tube retrofit
Dentron Clipperton w/2 X GI7B tube retrofit
Johnson Invader 200 (not 2000)
Eico 730 modulator w/cover
Ameco TX-86 transmitter
Drake 1A receiver
Heath SB-600 w/ps
and parts, meters, etc
73,
Pat AA4PG; Listing #1747760 - Submitted on 10/29/25 by Callsign AA4PG, Modified on 10/30/25, Web Site: http://cahabatechnology.com/aa4pg.html - IP: syn-024-181-123-146.biz.spectrum.com; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FS: RF-Kit RF2K-S Amplifier: RF2K-S for sale in perfect cosmetic and operating condition. Late model, low operating time. Zero issues. Single owner, non-smoker. Includes power cord, custom cover and user-printed manual. $5100 shipped CONUS. New, these amps are $6130 + tax. Payment by US Postal Money Order, Zelle, or check. Ships after any form of paper money clears. No trades. I have 11 HF amplifiers - thinning out the collection. Not interested in any other offers at this time. Ad will be removed when sold.; Listing #1747870 - Submitted on 10/30/25 by Callsign W9AC, Web Site: http://www.w9ac.com - IP: 204.1.21.181; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Acom 2100 1500w HF + 6m linear amplifier: The Acom 2100 provides 1500w PEP on all bands. Antenna VSWR up to 3:1 is acceptable with 1500 watts forward power. It has three switchable RF outputs. Uses a single 4CX1000 tube.

This amp has been well-taken care of and works perfectly. It is very easy to tune. The 2100 is absolutely the best amplifier I have ever owned. It is rock solid, takes only 10 to 50 watts to drive it to full output.

The fault circuitry is very well designed and operator errors are handled very efficiently.

Cosmetically it is very good. There are some scratches on the sides.

Comes wired for 220V power. The original boxing and manual are included. Because of its weight (75 lbs) and the need to remove and the transformer (per Acom), I will not ship this amp. Local pickup only. Local pickup is 10 miles south of Cleveland, Ohio, or I will meet you within a 120 mile radius of Cleveland.
Selling for $2900. The retail price is now $5390. Save $2490!; Listing #1747869 - Submitted on 10/30/25 by Callsign W8GJ - IP: 76-230-3-193.lightspeed.gnvlsc.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Ameritron als-600: Amp is clean in very nice condition works as it should has qsk mod also has remote inputs on front prefer local deal $1100; Listing #1747240 - Submitted on 10/23/25 by Callsign N9RG, Modified on 10/30/25 - IP: 198.89.243.237; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE: RF Power RF-2K+: RF Power RF-2K+ (also known as RF-Kit) with built-in antenna tuner.
Latest LDMOS Transistors: High-performance components for enhanced efficiency and reliability.
New Raspberry Pi 4: Upgraded to the latest model with a fresh SD card and the most recent software image installed.
Performance: Delivers 1.5kW power output across 1.8-28 MHz, and 800W on 50 MHz, making it perfect for various HF applications.
Fully Aligned: Aligned and ready to operate out of the box.
Includes: Power cord and computer interface cable for easy integration.
Price: $4400 obo; Listing #1747091 - Submitted on 10/22/25 by Callsign W5MF, Modified on 10/29/25 - IP: 99-62-241-156.lightspeed.hstntx.sbcglobal.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
For sale L4B at Stone Mountain hamfest: For sale at Stone Mountain hamfest. Drake L4B. Great condition. I am downsizing and moving to a 55+ community. $900
I am good on QRZ.
Thanks, Ron WB4OQL; Listing #1747852 - Submitted on 10/29/25 by Callsign WB4OQL - IP: syn-096-037-005-064.res.spectrum.com; Click to Contact -- Send this Ad to a Friend