nc-140 running hot
 

On Mar 9, 5:00 pm, wrote:
What is generally indicated when a power transformer is very hot, and
the 7w power transistor in its vicinity is also very hot? The radio
works but will often "go quiet" after 10 minutes or so of operation.
Any suggestions would be greatly appreciated.

All the electrolytics are bad. Every single one of them. Eventually
they'll wreck the transformer by pulling too much current, or one of
them will explode and spew shrapnel all over the inside of the case.
Change them out.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

nc-140 running hot
 

On Mar 10, 1:51 pm, (Scott Dorsey) wrote:
On Mar 9, 5:00 pm, wrote:

What is generally indicated when a power transformer is very hot, and
the 7w power transistor in its vicinity is also very hot? The radio
works but will often "go quiet" after 10 minutes or so of operation.
Any suggestions would be greatly appreciated.

All the electrolytics are bad. Every single one of them. Eventually
they'll wreck the transformer by pulling too much current, or one of
them will explode and spew shrapnel all over the inside of the case.
Change them out.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Well, all the voltages are right at the power supply with the new
caps. The transformer runs cooler, I was able to align the 230 kc IF
but cannot get a peak from the 2215 kc IF section. Im going to have to
order a 12BE6 as it is the 2nd mixer 2nd conv osc where the 6BE6 is
now residing. Thanks for your comments.

nc-140 running hot
 

wrote:

Well, all the voltages are right at the power supply with the new
caps. The transformer runs cooler, I was able to align the 230 kc IF
but cannot get a peak from the 2215 kc IF section. Im going to have to
order a 12BE6 as it is the 2nd mixer 2nd conv osc where the 6BE6 is
now residing. Thanks for your comments.

Triode in Chicago definitely has NOS 12BE6es for cheap if you can't wait
until the hamfest.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."