Hey Evan,
Great to hear from you. Hope everything is FB. I cleaned the gain
pot last time I was in the amp and replaced the 5K 7 watt'er (just
cuz) when I re-built the supply. The whole ALC set-up has never
really worked very well, but haven't had anything to compare it to
either,
Hi all, Bought an immaculate looking TR4 which has been out of use a long time.
Also bought an AC4 which claims to have had the original EHT caps and diodes
replaced. Powered them up with 20 vac for four hours, then up in 20 v steps at
four hours per step, listening and sniffing for any
Is it possible power supply was set for 110V not 220V? I do not believe it's
the TR4-although of course it could be. If it was, I should think you would
have lost a diode(s) or Heaven-forbid: the transformer. It could have been a
faulty diode that caused it-hence, after making sure about the input
On 8/23/2012 1224, Damien Mannix wrote:
Hi all,
Bought an immaculate looking TR4 which has been out of use a long
time. Also bought an AC4 which claims to have had the original EHT
caps and diodes replaced.
Powered them up with 20 vac for four hours, then up in 20 v steps at
four hours
I forgot to mention I was present when one within my Drake L7 went. Filled
the basement with little tiny things that looked a lot like tiny black
butterflies fluttering to the floor. I don't remember if diodes went or not.
But it did repair easily enough.
Ed Tanton
website:
Excellent condition Drake T4XC transmitter and AC4 power supply for sale.
Also, AC4 power supply capacitor upgrade kit to be installed. If interested,
send me an e-mail or call (478-452-2957) and make a reasonable offer on the
package or single items.
73,
Bill Mills
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