What does the HV indicate in standby, transmit (no drive, just idling) and
key-down at full power?
This is key to determining if it's actually a power supply problem.
-----Original Message-----
From: Amps <amps-bounces@contesting.com> On Behalf Of r-emails@n5ot.com
Sent: Sunday, September 3, 2023 3:38 PM
To: amps@contesting.com
Subject: [Amps] Henry hum on transmitted signal
I see there was no content in my messages the first time around. I'm not sure
what the problem is, but the workaround is to use a different email program.
Here's what I wrote:
- - - - - - - - - - - - - - - - -
Greetings,
I have a Henry 2K-4A console, and when I use it on the air, a few people have
told me my signal is not pure. One described AC hum on both sides of my signal
frequency. Another friend said I had "sidecars."
My conclusion is I need to replace the big (oil-filled) capacitor in the power
supply. I have a friend with an older Henry, I think it was a
2K-3 console, who had a similar-sounding issue, and he says he changed his big
capacitor in the power supply, but it didn't really fix the problem. He sold
the amp and I got the capacitor that didn't fix his problem.
Two questions:
1. Am I looking in the right direction or the wrong direction? Any other PS
due diligence I need to do? Any Henry 2K-4A-specific anecdotes in the brain
trust?
2. My Henry has the factory capacitor from the 1970s, which is 20uf @
5000 volts. The replacement I have says "replacement for Henry capacitor" but
the values are 16uf @ 7500 volts. It's close to the same physical size but not
exactly the same size. It has a 2019 date stamp.
Guidance appreciated.
73 - Mark N5OT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|