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Topic: [solved]Another V6 service question (Read 1705 times)
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WD8BXS
alter Hase
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Posts: 286
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[solved]Another V6 service question
« on: 20. November 2018, 00:03:58 »
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just finished a V6 board set, all works well, but i am getting full output on 80/160 meters with no drive levels.
Receiving just fine, putting out a signal there as per my 7610 scope, no spurs.
Any ideas where to look for this bug??
Thanks,
Chuck
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| « Last Edit: 23. November 2018, 04:24:03 by DL8EBD » |
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Thanks,
De WD8BXS vy 73
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DB4PLE
positron
Urgestein
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Posts: 1278
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Re:Another V6 service question
« Reply #1 on: 20. November 2018, 11:20:32 »
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Hi Chuck,
check bias voltage and current consumption change when going from SSB rx to transmitting SSB without audio signal.
Have you tried to actively set the bias and does the current consumption change when changing bias?
If current changes, bias voltage is applied when transmitting as it should. However, it may be much higher than expected -> something around the bias ciruit is faulty or of wrong value and provides higher bias than expected.
If rx current is much higher than normal and does not change when going to tx, bias voltage is applied all the time, potentially a fault in he bias hardware.
73
Danilo
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WD8BXS
alter Hase
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Posts: 286
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Re:Another V6 service question
« Reply #2 on: 20. November 2018, 20:54:59 »
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Yes that is true, but only on 80/160 meters.
works fine on all other bands.
I will do some voltage checks at a later date.
Thanks
Chuck
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Thanks,
De WD8BXS vy 73
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DB4PLE
positron
Urgestein
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Posts: 1278
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Re:Another V6 service question
« Reply #3 on: 20. November 2018, 21:00:02 »
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Hi Chuck,
yes, you're right. Can't be a general failure of the bias unit, otherwise it would occur on all bands.
73
Danilo
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WD8BXS
alter Hase
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Posts: 286
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Re:Another V6 service question
« Reply #5 on: 22. November 2018, 21:24:43 »
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I Installed the PTT relay and that fixed the issue.
I don't understand, but it worked.
Chuck
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Thanks,
De WD8BXS vy 73
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WD8BXS
alter Hase
Offline
Posts: 286
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Re:[solved]Another V6 service question
« Reply #7 on: 24. November 2018, 13:44:50 »
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Yes, I thought that involved more than one band when that happened.
Chuck
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Thanks,
De WD8BXS vy 73
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