[Amps] Anyone around the King George, VA area

[Mel]

Hello Cam,
 
Before starting any electronic repair on vintage equipment, one should throughly inspect the shack for "Gremlims", it looks like you are the victim of one.
 
If the pilot lamp comes on, then the keyer circuit has voltage and you probably have a small problem with the foot switch / PTT.
 
When you power it on and smoke, fire and, fuses exploding DID NOT happen, then you probably have the new caps installed correctly, carefully check the HV AC voltage in (Red/Yel and Red wires) at the new diode block and on both sides of R9, look for approx 1200 VAC.  If it is there, and you have no B+ across the capacitor bank then the diode bank is bad.  If you have B+ across the caps but, not to chassis ground then, the resistor R8 is open.
 
If, you have a Variac around the shack, bring it up on that and make your voltage checks at a safe level and I am sure you will find the problem.
 
I am in Cincinnati, Oho which is just a little outside the boundry of "reasonable travel distance", Good Luck.
 
73
 
de KO0M
 
 

--- On Fri, 12/26/08, walnutcreek at appstate.net <walnutcreek at appstate.net> wrote:

From: walnutcreek at appstate.net <walnutcreek at appstate.net>
Subject: Re: [Amps] Anyone around the King George, VA area
To: itz_da_police at yahoo.com
Date: Friday, December 26, 2008, 4:58 PM


HI Mel,
I replaced the HV filter caps with new 210uf 450v computer grade caps from Harbach.  I'm getting no HV to the plates and the relay circuit isn't working.  Simple as it is, it is wired correctly has a new Diode Block from Henry Amps.  I'm as puzzled as can be, the amp worked fine other than the original caps were showing signs of leakage before the change out. I was advised to change the diode block at the same time as the caps.  I've gone over the circuit with a fine tooth comb for finding something I did wrong and can't so I'm reaching for help.  I work at the the Dahlgren NSWC base Monday to friday and will be off and staying at the cottage there on New Years day so am available to travel with the amp to someplace reasonably close for help in discovering the faults. Where are you at?
Tnx es 73,
Cam



From: Mel <itz_da_police at yahoo.com>
Sent: Friday, December 26, 2008 2:09 PM
To: walnutcreek at appstate.net, amps at contesting.com
Subject: Re: [Amps] Anyone around the King George, VA area






The Hunter "Bandit" 2000C, nice simple amp.
 
Hello WA4JKW,
 
What is your amplifier doing that it should not be doing or, what isn't your amplifier doing that it should be doing?
 
Mel (ko0m)
 


--- On Thu, 12/25/08, walnutcreek at appstate.net <walnutcreek at appstate.net> wrote:

From: walnutcreek at appstate.net <walnutcreek at appstate.net>
Subject: [Amps] Anyone around the King George, VA area
To: amps at contesting.com
Date: Thursday, December 25, 2008, 11:05 AM

HI all,
I'm stumped and wondeer if anyone that's good at amp repair is near
King George, VA.  I work at the Navy Base there and am at the cottage during the
week.  I'd appreciate if someone would take a gander and give me a hand
troubleshooting an old Hunter 2000C.  Simple amp with issues.
Thanks,
Cam
WA4JKW


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