Cobra UK25LTD power output adjustment??....

[curny]

Anyone know what bit to twiddle inside a Cobra UK25LTD ST to lower the power output.
Mines currently doing nearly six watts, but need to lower it to below 4 watts to drive an amp.

Thanks,
Curny

[Arby80]

Don't have a schematic but adjust L10, L9 and L8 for RF Output.
(taken from somewhere on the net)

[curny]

Don't have a schematic but adjust L10, L9 and L8 for RF Output.
(taken from somewhere on the net)

Those are for the US spec AM radios
This is a UK25LTD - totaly different guts.....

[Arby80]

Don't have a schematic but adjust L10, L9 and L8 for RF Output.
(taken from somewhere on the net)

Those are for the US spec AM radios
This is a UK25LTD - totaly different guts.....

It was quoted as being for the LTD as well

lol, big pimp doesnt like these rigs too much

http://citizensbandradio.org.uk/forum/i ... opic=848.0

Am curious though, all the specs say its a 4w rig? how is yours doing 6?

[MARKASTERIX]

I do know these radios have a 2SC1969 output worth swopping for a cheap 4W one!!

[Dragonfly]

Only have the uK29LTD in me scribble pad but may use the same board as the UK25LTD , If so then RV202 is the power adjuster .

[Clint]

Don't have a schematic but adjust L10, L9 and L8 for RF Output.
(taken from somewhere on the net)

Arby the inductors never reduce output as such just detune the frequency trap, only ever adjust these if you either have a bandpass watt meter or a spectrum analyser. For instance you can nearly always get more watts displayed on a watt meter by tweaking these but almost never on the band you want the power on, this leads to interference and also extra heat that can kill and will deteriorate the final transistors over time.

[curny]

Only have the uK29LTD in me scribble pad but may use the same board as the UK25LTD , If so then RV202 is the power adjuster .

Perfect!!
Yes, board is the same for 25 and 29

Thanks Dragonfly