PLL02A SSB low on power

Willo · Post by **Willo** » Sunday 27th May 2007, 17:21

Hello, I have an Electrophone SSB Base CB with the single board PLL02A.Board TP-S14-5.
The problem is it has low TX power output on USB and LSB.AM is fine.When I talk, my watt meter says 2-4 watts out.When I whistle I get about 8 watts out.Is this a sign of final TR on its way out? The radio was purchased of Ebay so I would say someone has had their fingers in it.
Could someone tell me how to align the TX power output on SSB please..
I only have a SWR/PWR meter, a freq counter and multimeter at hand is this enough to pull a few more watts out.

P.S Watts meter tested on another radio and works fine.

Thanx Glenn

Also I would like to put a tranmit slide it it as well.

kc8mob · Post by **kc8mob** » Monday 28th May 2007, 6:34

What is the model of the radio exactly. Like a tx something or other.

Rick · Post by **Rick** » Monday 28th May 2007, 10:12

Check L14 it is known to go short.

Rick.

Willo · Post by **Willo** » Monday 28th May 2007, 13:05

Thanks Rick I will check L14......The radio is identical to the Kraco SSB Base..the woodgrain cover, two meters ect ....but it has the PLL02A cybenet single board. It is an Australian model.

Willo · Post by **Willo** » Monday 28th May 2007, 13:52

Hey just a dumb question but how do i check L14 ...do I look for continuety or voltage

.

Rick · Post by **Rick** » Tuesday 29th May 2007, 1:43

If it looks burn up just replace it, also check the RF choke in the PA stage, you should find 2 with a black cover if they have burn up change them.

Rick.

Willo · Post by **Willo** » Saturday 23rd Jun 2007, 17:27

Thanx Rick I managed to get about 8 watts out of it..I'm happy with that,she's an old rig...I need to adjust the squelch on it ,whens its cold it seems that the squelch is on..after it warms up it RX's fine.can you tell me which pot adjusts the squelch...cant seem to find out which one it is. the PCB is PTBM058COX AM/SSB cheers Glenn

Rick · Post by **Rick** » Saturday 23rd Jun 2007, 23:28

The squelch pre-set's are RV9 for SSB and RV10 for AM.

Rick.

Willo · Post by **Willo** » Sunday 24th Jun 2007, 15:48

Thanx Rick.

Willo · Post by **Willo** » Monday 25th Jun 2007, 14:52

Hmmm I got a bit of a problem...the radio seem to be in the squelch mode.When I turn the RF gain down to about half half way it opens the squelch and the radio works fine and when the radio warms up(left on for a while) it seems to operate fine. The radio is still TX'ing and RX'ing but the squelch seem locked on, every now and then the white noise breaks the squelch.Any ideas??

Rick · Post by **Rick** » Tuesday 26th Jun 2007, 2:31

Check Q32 the base should be about 2.0 vdc emitter 2.7 vdc and collector 0.7 vdc the emitter and collector voltages will change has you open and close the squelch, check the voltages while adjusting the rf gain and let us know the voltages it maybe a good idea to check the voltages with the radio cold and warm. I have add trouble with C148 leaking and D34 and D35. Hope this helps.

Rick.

Willo · Post by **Willo** » Thursday 5th Jul 2007, 16:04

Thanks Rick. I will get back to you with the voltages may be a few days though. Bit busy atm..Thanks again.

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PLL02A SSB low on power

PLL02A SSB low on power

Re: Electrophone SSB low power

Re: PLL02A SSB low on power

Re: PLL02A SSB low on power

Re: PTBM058COX PLL02A bad squelch.