John,
I have repaired several with this problem.
If you want I'll contact you off list with the details and PIX.
Very basically:
Dig out potting (don't start until I send details!)
remove oven cylinder
rewind oven coil
add new thermistor if needed
install and wire new oven
measure temp and sele
Exactly what I did but I found a correct modern transformer for the crt I
fixed with the short.
Something from Digi-key with the right isolation.
That said its an approach that can be considered.
Regards
Paul
WB8TSL
On Mon, Aug 20, 2018 at 5:20 PM, Gary Woods
wrote:
> On Mon, 20 Aug 2018 15:19:4
On Mon, 20 Aug 2018 15:19:46 -0400, you wrote:
>Same with a CRT short.
Back in the day, you could get an in-line isolatiion transformer to
"fix" a heater>cathode shorted CRT.
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John
Sorry to hear of the problem. Agree with a digging in and others will give
you good advice.
However if it just comes down to the very very difficult job of digging in.
Consider floating the heater with a isolated supply and optical switch
driver. Because the lamp heater uses the same common su
My HP 5065 has developed a fault. The LAMP OVEN heater winding has developed an
internal short to ground. It is not a dead short (about 9 ohms) and it is
intermittent, developing when the oven is hot. I shall have to open the RVFR to
fix it. I don't know what I'll find. I have no drawings to gui
