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<DIV>While it takes some time, 30 seconds to a minute, to get a trace, 10 to 15
minutes is much too long. CRT may be going bad, or there might be HV issues.
Check the various high voltages to see if there is creepage from low to high.
The most common problem with these things are the HV caps and resistors that
have moved value well beyond their tolerance rating.</DIV>
<DIV> </DIV>
<DIV>Pete, wa2cwa</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>On Tue, 12 Jul 2011 07:28:48 -0700 (PDT) "K5MLC \(Mike\)" <<A
href="mailto:k5mlc@sbcglobal.net">k5mlc@sbcglobal.net</A>> writes:</DIV>
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<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">Hello
everyone,</SPAN></DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">Thanks for all the great
ideas! Here is an update on the HO 10 scope project: I opened her up and gave
her a good look over, looking for obvious burned stuff, loose stuff, etc. I
unplugged the tubes and did a visual on those, and returned them to their
sockets. I measured the caps and resistors and found nothing "way out,"
although several of the hv resistors are higher in value and are on the
"replace" list. I found nothing obviously damaged, so I plugged her in and
switched her on, again watching for anything unusual. The tubes lit
up. I waited, but no trace on the CRT. I decided to let her
remain</SPAN><SPAN style="RIGHT: auto"> on and "cook" a while ~ after
10-15 minutes - finally, here came a trace! I have repeated this
scenario several times, and I have even put her in the "loop" and monitored my
signal FB. </SPAN></DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">So, any ideas about what to
replace to eliminate the "wait" time? All the tubes are reasonably priced
except the 6C10! That one is pricey! (On, and BTW, I do have the
assembly manual and schematic.) </SPAN></DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">Thanks for everyones
assistance. </SPAN></DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">Mike</SPAN></DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </DIV>
<DIV style="RIGHT: auto"><SPAN style="RIGHT: auto">Chuck, Hayseed has a recap
kit listed for an HR 10, but not the HO 10. But it looks like they would
assemble one for me if I requested it. Thanks for the info. <VAR
id=yui-ie-cursor></VAR></SPAN></DIV>
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