I have the above radio and all is fine on AM/FM. 25W output on full power and great TX audio. On SSB however there's only around 6W output on a whistle, but still with great TX audio.
Now this can't be a driver/outputs issue as they're providing exactly what they should on AM/FM (This is the 2 × 1969 version) and the RF power is variable. I've noticed that the ALC preset doesn't actually do anything. It's the same 6W output wherever it's set to. I've checked the back of the PUB and nothing's been added to bridge over it (like in the French Jackson's etc). Next step, when I find my meter, is testing the output regulator.
Does anyone have any ideas outside of that?
Cheers.
Magnum Deltaforce Low Output On SSB.
- astradyne
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Magnum Deltaforce Low Output On SSB.
Never, ever, ever....bloody anything ever!
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Far too many radio's to list here. But I do own a legal one...
- ch25
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Re: Magnum Deltaforce Low Output On SSB.
What is voltage on final(s) collectors on SSB TX?
Do you have PEP meter, dual tone generator, scope?
If alc pot is not responding, first thing is to get it working again.
Chris
Do you have PEP meter, dual tone generator, scope?
If alc pot is not responding, first thing is to get it working again.
Chris
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- astradyne
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Re: Magnum Deltaforce Low Output On SSB.
Hi Chris.
The voltage on the collectors of both 1969's is 12.6V.
I don't have any of the equipment you mentioned. Too technical for me.
The voltage on the collectors of both 1969's is 12.6V.
I don't have any of the equipment you mentioned. Too technical for me.
Never, ever, ever....bloody anything ever!
Far too many radio's to list here. But I do own a legal one...
Far too many radio's to list here. But I do own a legal one...
- ch25
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Re: Magnum Deltaforce Low Output On SSB.
Remove Q174 to check if disabled ALC will change anything.
Check D189 and Q141.
Check bias current for driver and final(s).
Come back with results.
Chris
Check D189 and Q141.
Check bias current for driver and final(s).
Come back with results.
Chris
WE ARE MOTÖRHEAD, AND WE PLAY ROCK N' ROLL
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- astradyne
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Re: Magnum Deltaforce Low Output On SSB.
Will do Chris.
Never, ever, ever....bloody anything ever!
Far too many radio's to list here. But I do own a legal one...
Far too many radio's to list here. But I do own a legal one...
- cb4ever104
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Re: Magnum Deltaforce Low Output On SSB.
I second that . People will do all sorts to max out the ALC , including removing components etc. I'd check that part of the circuit first and get it working .
Sammy
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- astradyne
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Re: Magnum Deltaforce Low Output On SSB.
Ok. Removed Q174 and no difference whatsoever.
Never, ever, ever....bloody anything ever!
Far too many radio's to list here. But I do own a legal one...
Far too many radio's to list here. But I do own a legal one...
- ch25
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Re: Magnum Deltaforce Low Output On SSB.
Let's go further. Remove Q142 and check SSB power. What is current consumption on TX btw?
WE ARE MOTÖRHEAD, AND WE PLAY ROCK N' ROLL
You can't have too many antennas...
You can't have too many antennas...
Re: Magnum Deltaforce Low Output On SSB.
Hi astradyne I would suggest that you look at the schematic and go tru the radio slowly Check all electronic components to be there and in spec/working and function properly before removing anything . Cheers n 73's