The pass transistor or transisitors, would be the large ones mounted on a
heat sink. HOWEVER, it appears that the regulator IC would be defective.
The regulator probably is a 723, or 317. Also could be a defective
connection around the regulator. I do not have a schematic to refer to.
If there is a voltage control, and that pot is defective (open) you could
have that problem.
Ken, WA4RPH
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]On
Behalf Of Edward Crawford
Sent: Sunday, September 21, 2003 11:01 PM
To: tentec
Subject: [TenTec] 252M supply putting out 19 volts!?
I have found that the 252M supply that I have had sitting on the shelf here
for months and months is putting out slightly over 19 volts. Guess I should
have tested it after I bought it! Glad I didn't hook a radio up to it. More
importantly I'm glad I didn't let someone else hook their radio to it.
I'm assuming it must be the pass transistor that causes this? That is ,
according to previous posts I have read on this reflector. Bear in mind I
have no idea what a pass transistor looks like. I know what a transistor
looks like, but I don't know which one it is. I'm sure if some of you fine
folks will lend me your expertise I will have this thing straightened out in
short order.
You see, the thing is that I have had this very nice looking power supply
sitting here that is almost in mint condition, and now I find that it don't
work right. I feel obligated to get it working, so I can find a radio that
matches it, and set it here with all the other stuff that looks like it :>)
Your help with this, I can assure you, will be greatly appreciated.
Thanks and 73. Ed/w4wvw
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