Originally posted by x-pro
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Traynor Beta 800 testing
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Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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There is no 5W 2.7k...
At the right of C10 there are 2x 100ohm 1w resistor (R8, R9) between the +65v rail and Q1 collector.
R10 and R11 are 4.7ohm 0.5w between Q1 and Q2 emiters and the ground.
And 2x other 100ohm 1w resistor (R12, R13) between the -65v rail and Q1 collector.
I will swap ZD4 and ZD5 to see if the problem move and repace ZD3 for a new load tested one.
I figure only Q2 will be left at that point.
Or since Q1 is triggered by the negative rail via ZD5, is it this one that regulate the negative rail ?
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I'm attaching the complete service manual for the earlier versions. See 'Important' note on pg.9. It's possible Q1 or Q2 may have been damaged.
Suggest you connect the amp boards like x-pro suggested. The bulb limiter may be what is giving you trouble. A variac would be better. Follow the test procedure on pg.9 and 4 of 'SM'.
edit: adding 'SM2' manual containing some other infoLast edited by g1; 08-05-2024, 05:52 PM.Originally posted by EnzoI have a sign in my shop that says, "Never think up reasons not to check something."
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