[Hammarlund] normal operating temp of power transformer for HQ-180

[Greg Mijal]

Hi Bob:

If an excessive load on the power supply is not heating the transformer then
I suggest you install a buck boost in series with the radio's AC supply.
Kicking down the input as little as 5 vac may eliminate the hot transformer
case completely.
Good luck
Greg
WA7LYO
in sunny Feenix
----- Original Message -----
From: "Bob Young" <youngbob53 at msn.com>
To: "hammarlund" <hammarlund at mailman.qth.net>
Sent: Thursday, July 07, 2005 1:08 PM
Subject: [Hammarlund] normal operating temp of power transformer for HQ-180


How hot should the power transformer get on these? The normal line voltage
here is right about 120 VAC and the transformer gets hot enough where it's a
bit uncomfortable to touch at first although it does not burn to the touch.
I held an old alcohol thermometer against the side of it and it seemed to
stop at about 120 degrees but it may be a little hotter than that. would a
little fan be advised for it, a Variac perhaps or is this normal? I'd hate
to have to find another transformer for this radio.
Incidentally I'd like to thank the people here who advised me to recap the
radio, I sent it off to Frontier Capacitor and they redid the cap and it
runs much cooler now than it did before. They do a nice job and are quick on
the turn around time.

Bob Young
Millbury, Ma
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