Page 1 of 1

Cobra 25ltd st

Posted: Thursday 20th May 2010, 15:01
by SinStp
Curious if anyone knows what L20 adjusts or could tell me where to find what it adjusts on Cobra 25 LTD soundtracker , manufactured in may 97. Its the tuning can right next to pa/ext speaker jacks. Long story short i left it open and my very helpful son turned it all they way in. Recieves and transmits fine just not sure what it does and its driving me nuts. Thanks, Mike

Re: Cobra 25ltd st

Posted: Sunday 6th Jun 2010, 11:13
by The Defpom
L20 is the 54MHz filter, it is tuned to limit RF output on 54MHz (1st harmonic), you need a spectrum analyser to adjust it properly.

Your probably best to just adjust it back to about 3/4 (towards the top), that should at least be approximately correct, certainly closer than where it is now.

Re: Cobra 25ltd st

Posted: Monday 14th Jun 2010, 14:52
by SinStp
Thank you sir , thats what I'll do. Thanks for the response.