[TenTec] TT 210 psu

[ROLAND HOWELL]

Hi Shawn
Thanks for your reply.
The circuit is exactly as TT designed, i have the diagram to follow and 
confirm component values and types.
73
Snowy g0hze

------ Original Message ------
From: "Shawn via TenTec" <tentec at contesting.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Cc: "Shawn" <kb1ckt at yahoo.com>; "ROLAND HOWELL" 
<snowy.howell at btinternet.com>
Sent: Monday, 27 Jun, 22 At 19:26
Subject: Re: [TenTec] TT 210 psu
Is there a missing bleeder resistor? I wouldn’t think 1.5A is required 
for good regulation but perhaps it just needs more current.
Shawn kb1ckt
Sent from my iPhone
On Jun 27, 2022, at 6:18 AM, ROLAND HOWELL via TenTec 
<tentec at contesting.com> wrote:

Hi all
I recently sold a TT 210 power supply having tested it, as i always do, 
before listing and subsequently selling.
The new owner commented on how well it was packed but then started to 
doubt my parentage, my honesty and a host of other things that are not 
printable.
What happened was that before hooking up to his radio he tested the NO 
LOAD voltage which was approx 23volts, i sent him a refund and paid for 
the return of the unit.
I tested it and sure enough 23 volts on the fluke 73, however when i 
attached it to my dummy load at 1.5amps it immediately dropped to a 
whisker under 12volts which is close to the rated output.
Wanted to keep it it as original as possible internally, this of course 
may not be possible, i renewed 99% of the components, still same result.
Is this normal?
Or should i rebuild it using more modern components, a 7812 or 7815 etc.
As usual any and all thoughts/advice welcome
Thanks, Snowy G0HZE

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