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Sonar FS-2340

Posted: Mon Feb 12, 2018 5:52 pm
by 479tx
GF,

Ever widened up a Sonar FS-2340?

Was thinking fatten up the caps inside and put rack gear into the mic jack? What do you think?

Re: Sonar FS-2340

Posted: Mon Feb 12, 2018 8:20 pm
by 479tx

Re: Sonar FS-2340

Posted: Mon Feb 12, 2018 10:19 pm
by Goldfinger
Looks like it would be easier to inject after the clipper. I'll write up how tomorrow or the next day.

Re: Sonar FS-2340

Posted: Tue Feb 13, 2018 8:51 am
by 479tx
Thanks GF!

I just came into possession of a like-new FS-2340. Clipper board isn't even bypassed yet.

479tx

Re: Sonar FS-2340

Posted: Thu Feb 22, 2018 11:38 am
by Goldfinger
Disconnect the coax from points 105 and 106 on the clipper board output and direct inject the coax.
sonar 2340 clipper.jpg
sonar 2340 clipper.jpg (41.74 KiB) Viewed 5 times


Change C71 to a .22uF, 250 volt (or higher) disk, polyester or mylar.
Change C74 to a .22uF, 400 volt (or higher) disk, polyester or mylar.
Change C75 to a 10uF, 50 volt electrolytic, observe polarity

Changing these caps also widens the receive automatically. *bonus!* :mrgreen:

Re: Sonar FS-2340

Posted: Fri Feb 23, 2018 9:25 pm
by 479tx
Easy enough! Thanks a lot, Goldfinger. I'm going to give it a try this weekend assuming on-call with work is quiet.

Will let you know how I make out.