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help with Heathkit sb-230 amp: Hello:.
just got a heathkit sb-230 in good condition but with issues. prior owner had it working with about 450 watts out using 75watts drive(tube is good) which i think is about right, so he decided to replace the caps With 6 new 220mfd 500vdc to try to get more output so he turned on and show about 2400vdc in the meter but after a while the meter died "no smoke".. i opened it up and yes
there is HVDC and plenty of it going to the plate, dont ask me how i test it!!! l learn the hard way LOL… it hurt!!! so i place an old HVDC tester to check, and the picture show the reading from plate..
i do not have any schematic and the ones in the webb are too small for me to read nor i have the ability to work any more in this equipment..all that said I know there are people here than can help.. Oh forgot to mentioned that I check the meter selector switch and some voltage divider.resistors as well as diodes..tested good
any suggestions will be really appreciated..
73’s
Hiram.; Listing #1766735 - Submitted on 05/01/26 by Callsign AG4KH - IP: 47-200-254-199.fdr02.brnd.fl.ip.frontiernet.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
WANTED: Acom 04AT ATU: Looking for a compatible antenna tuner for Acom solid state amp.
Must be in good working condition.
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Let me know what you have.
Please reply ONLY thru the QTH system.
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SCAMMERS WILL BE DELETED.
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Thank you for looking.; Listing #1766728 - Submitted on 05/01/26 by Callsign WA3MOJ - IP: pool-108-16-42-161.phlapa.fios.verizon.net; Click to Contact -- Send this Ad to a Friend
Ameritron AL-1306: Amp works great as it’s suppose to looks great local deal will be $1800; Listing #1766697 - Submitted on 05/01/26 by Callsign N9RG - IP: 198.89.243.225; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
WANTED: Mercury Lite Amp: I would like to purchase a Mercury Lite HF Amplifier. Please only use QTH to respond.
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Larry W6LVP; Listing #1766567 - Submitted on 04/30/26 by Callsign W6LVP, Modified on 05/01/26 - IP: syn-104-032-076-244.res.spectrum.com; Click to Contact -- Send this Ad to a Friend
FOR SALE: Ameritron ALS 600 and ALS 600: Very clean ALS 600 with ALS 600 power supply. Has 10 meter mod. WIred for 120v.
Second owner..first owner never got licensed and didn’t use..don’t smoke, chew or break wind.. Note power supply faceplate bottom has the typical Ameritron “curl” … does not affect performance…just noticeable for all you collector quality enthusiasts.
$800.00 plus shipping; Listing #1766659 - Submitted on 05/01/26 by Callsign W6TS - IP: 172.56.109.123; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
For Sale: KC5PCB Yaesu Interface: For Sale: KC5PCB Yaesu Interface
For sale my Yaesu FTDX 101 MP to Expert amp interface cable. I got this cable from the gentlemen I bought my radio from so never used by me. Still has Dan’s card attached and in original bag.
Shipped lower 48 for $50
Thanks N3GH; Listing #1766647 - Submitted on 05/01/26 by Callsign N3GH - IP: c-73-230-40-83.hsd1.pa.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Elecraft KPA500 500 W AMP # 1597 READ: Elecraft KPA500 Linear Amplifier # 1597 - please read :
$1999 Delivered - check, Zelle , PP FF ok.
You are looking at a good working amp that has a minor issue.
In Standby, the HI TEMP light comes on,and it faults.
As soon as it's put into operate,the fault goes away,and it puts out 500 watts no problem.
Maybe a sensor telling amp that is too hot when it is not ?
This happens when you turn it on,so it is not to hot.
I am not a tech guy,but I am sure there are guys out there who can diagnose this easily.
Please email with questions,
Larry k6ro; Listing #1766644 - Submitted on 05/01/26 by Callsign K6RO, Web Site: http://www.K6RO.com - IP: 99.37.37.86; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
FOR SALE: ACOM 1500 HF/6 Mtr AMPLIFIER: FOR LOCAL SALE ONLY - No Shipping!
Unit was purchased from an estate sale and has been under test and used on 160, 80, 40, 20 and 17 meters for 2 weeks. The amplifier operates as designed. The unit has also been tested on 15, 12 and 11 meters into a 1.5K dummy load. Legal limit is easily reached with 80 watts drive. The amplifier is clean, in very good condition, no dents or scratches. The unit comes wired for 240v.
A NEW ACOM 1500 from DX Engineering is priced over 5K!!!
Unfortunately, NO SHIPPING option available (There is NO original packaging) plus, the amplifier weighs almost 60 lbs!!
Price - $3100.00 (CASH or ZELLE ONLY) - No PayPal, Personal Checks or Money Orders.
All sales are FINAL - NO EXCEPTIONS !
NO RETURNS! NO WARRANTY !
The Amplifier is Operational and is working as designed.
The ACOM 1500 Operating Manual is available on line.
LOCAL SALE ONLY - TUCSON, MARANA or ORO VALLEY, AZ.
Please contact via email (ka7txs at gmail.com) or messaging here on QTH
73 de John
KA7TXS; Listing #1766560 - Submitted on 04/30/26 by Callsign KA7TXS, Modified on 05/01/26 - IP: c-98-225-110-39.hsd1.az.comcast.net; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
Alpha 8410 amplifier: I have an Alpha 8410 in like new condition inside and out. Included is the factory manual with the factory test report presets and schematics. Embroidered cover is also included. The cathode resistors were recently replaced per Alpha’s spec. Screen voltage and bias have all been verified and 100% within OEM spec. This amplifier is perfect. Legal limit with 20w, legal limit ++
$3500 or will trade up towards a nice Alpha 77 2 hole amp.; Listing #1766628 - Submitted on 05/01/26 by Callsign W4EKY - IP: 170.85.90.83; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend
HF, 6m, 2m and 70cm Amplifiers: HF Amplifiers For Sale:
Acom 1000 1KW HF/6M $2900
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6 Meters:
RF Power Labs Solid State 400-500 Watt Base Amp with Power Supply 120V
For repair - Make Offer
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2 Meters:
RF Concepts 2-317 30in 170out Preamp SSB Delay etc. $400 Shipped
Mirage B310G SOTA etc 1/4W to 8W In 100W Out with Preamp SSB Delay $310 Shipped
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70cm UHF:
Mirage D1010 Brown Face with SSB Delay etc.
10 in 100 Watts out
$375 Shipped; Listing #1766332 - Submitted on 04/28/26 by Callsign W4JST, Modified on 05/01/26 - IP: 73.99.134.215; Click to Contact -- Click Here to View Picture -- Send this Ad to a Friend