Galaxy Saturn - probs with TX power
 

Hi

I am from germany, so please excuse my bad english!

DF5WW told me this forum, as I have probs with my Galaxy Saturn, that you can help me?

I get the radio now from a 4 years ago died friend from his wife now.
The radio was not used for these 4 years. I wanted now to use it, but I had to find out, that it is sending only stable with maximum of 0,5 Watts
On "A band" with 0,1 Watts ... to "E band" maximum 3 Watts but in "E" then the TX is blocked. I have to switch it off and on again, or go back to "A" and push the TX for a short moment. I can TX on A to D for longer time. Only on E it blocks.

I have also an external watt-meter it displays the too low signal power too.

First I thinked that the amp is broken, so I have change the 2166 transistor - but nothing changed :(


What can I do to repair / fix it?
The mystery is: that I can not TX on "E band" for longer then 1 or 2 seconds - then the radio blocks the TXing. Then there is no reaction when pushing the mike button. I must switch off and on, then I can TX again. But in the other band (A to D) only with 1/10 of the normal power the radio must have.
When turning the power knob, the output power changes, so the potentiometer looks ok


I mad sure that the fault is not my antenna, because with other CBs I can TX and RX very good!
Also the problem apears with a dummy


I have the schematic/manual here - If some one has use for it and it is legal, I can post a link to it. Possible also needed to help me


Please help me! I THANK YOU !!!

:)

73,
Andy

Galaxy Saturn - probs with TX power
 

On Dec 9, 6:55*am, Speedmaster
wrote:
Hi

I am from germany, so please excuse my bad english!

DF5WW told me this forum, as I have probs with my Galaxy Saturn, that
you can help me?

I get the radio now from a 4 years ago died friend from his wife now.
The radio was not used for these 4 years. I wanted now to use it, but I
had to find out, that it is sending only stable with maximum of 0,5
Watts
On "A band" with 0,1 Watts ... to "E band" maximum 3 Watts but in "E"
then the TX is blocked. I have to switch it off and on again, or go
back to "A" and push the TX for a short moment. I can TX on A to D for
longer time. Only on E it blocks.

I have also an external watt-meter it displays the too low signal power
too.

First I thinked that the amp is broken, so I have change the 2166
transistor - but nothing changed :(

What can I do to repair / fix it?
The mystery is: that I can not TX on "E band" for longer then 1 or 2
seconds - then the radio blocks the TXing. Then there is no reaction
when pushing the mike button. I must switch off and on, then I can TX
again. But in the other band (A to D) only with 1/10 of the normal
power the radio must have.
When turning the power knob, the output power changes, so the
potentiometer looks ok

I mad sure that the fault is not my antenna, because with other CBs I
can TX and RX very good!
Also the problem apears with a dummy

I have the schematic/manual here - If some one has use for it and it is
legal, I can post a link to it. Possible also needed to help me

Please help me! I THANK YOU !!!

:)

73,
Andy

--
Speedmaster

Post the link to your schematic...

Galaxy Saturn - probs with TX power
 

"Speedmaster" ha scritto nel messaggio
.

Realign carefully the "circled blue" core coil and the "circled red" core
coil in metallic case near the PLL IC. Your PLL is not "locking" the VCO and
maybe the low power is due to extremely dirty output not in 27 mhz range, so
your final stage is driven by noise.

HTH, 73.

-.-. --.-

Galaxy Saturn - probs with TX power
 

Realign carefully the "circled blue" core coil and the "circled red" core
coil in metallic case near the PLL IC. Your PLL is not "locking" the VCO and
maybe the low power is due to extremely dirty output not in 27 mhz range, so
your final stage is driven by noise.
HTH, 73.

I think HTH's idea is sound... along those lines... the local
oscillator might also be stopping. This should be easy to confirm by
looking around the loop with a scope. I also had another thought that
your TX source might be intermittant. As you may or may not know...
most transceivers have multiple B+ sources. These sources are usually
engaged to various circuits... some in TX and others in RX. You should
definately check these sources for stable operation.
www.telstar-electronics.com