Hi group --- Looking for a power transformer for a HRO 60 or one that
would give me 240v at 140 ma. TIA John K3OPC

" nhoj" " wrote in message ...
Hi group --- Looking for a power transformer for a HRO 60 or one that
would give me 240v at 140 ma. TIA John K3OPC

======================================
John:

Before you replace that power transformer be sure to remove/replace
C-118. That is the 0.1 uF capacitor connected from pin 4 of V-17
(5Y4G) to the chassis. A shorted C-118 is probably what burned out
your original transformer. A shorted C-118 is a well-known problem
with the HRO-60 and it results in instant destruction of the power
transformer. That capacitor serves no useful function and should just
be removed. If you wish to replace it (and I wouldn't) be sure to use
a new capacitor rated at 630 VDC or better. And don't be fooled into
thinking that the AC line fuse will protect the power transformer - it
won't!

Best Regards,

Ed
Canyon Lake, TX

(Ed Engelken) wrote in message . com...
" nhoj" " wrote in message ...
Hi group --- Looking for a power transformer for a HRO 60 or one that
would give me 240v at 140 ma. TIA John K3OPC

======================================
John:

Before you replace that power transformer be sure to remove/replace
C-118. That is the 0.1 uF capacitor connected from pin 4 of V-17
(5Y4G) to the chassis. A shorted C-118 is probably what burned out
your original transformer. A shorted C-118 is a well-known problem
with the HRO-60 and it results in instant destruction of the power
transformer. That capacitor serves no useful function and should just
be removed. If you wish to replace it (and I wouldn't) be sure to use
a new capacitor rated at 630 VDC or better. And don't be fooled into
thinking that the AC line fuse will protect the power transformer - it
won't!

Best Regards,

Ed
Canyon Lake, TX

==========================

Oops! That should read "pin 4 of V-17 (5V4G)" not 5Y4G.

Ed