41-250 No sound, glowing 41 tube, can't be a good thing

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41-250 No sound, glowing 41 tube, can't be a good thing

rghines1
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Posts: 190
Threads: 8
Joined: Oct 2005
City: Lexington, SC

#12

02-27-2008, 04:35 PM

Hi,

Based on the field winding reading you are only pulling 40 mA which is about half as much than normal. The 41 output tubes may be biased near cutoff. Check the grid bias is on the 41 output tubes. Didn't see a voltage mentioned in the Rider schematic but would expect it to be minus 15-20 volts. If much higher than this than perhaps resistor (part 61) may have an open section.

The 84 rectifier should be OK.

Richard

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Messages In This Thread

41-250 No sound, glowing 41 tube, can't be a good thing - by justlrnin - 02-19-2008, 03:22 PM

[No subject] - by Harlan - 02-19-2008, 09:03 PM

[No subject] - by planigan - 02-19-2008, 11:34 PM

[No subject] - by justlrnin - 02-20-2008, 01:10 AM

[No subject] - by planigan - 02-20-2008, 02:21 AM

[No subject] - by Terry Judkins - 02-20-2008, 06:21 AM

[No subject] - by planigan - 02-20-2008, 01:08 PM

[No subject] - by Ron Ramirez - 02-20-2008, 05:51 PM

[No subject] - by justlrnin - 02-20-2008, 10:06 PM

[No subject] - by Ron Ramirez - 02-20-2008, 10:20 PM

[No subject] - by justlrnin - 02-27-2008, 02:18 PM

[No subject] - by rghines1 - 02-27-2008, 04:35 PM

[No subject] - by justlrnin - 02-27-2008, 06:33 PM

[No subject] - by Doug K. - 02-27-2008, 07:32 PM

[No subject] - by rghines1 - 02-27-2008, 07:50 PM

[No subject] - by FStephenMasek - 05-09-2008, 06:44 PM

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