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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 (41.63 KiB) Viewed 2489 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!*
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.
Re: Sonar FS-2340
Posted: Mon Feb 26, 2018 6:52 pm
by 479tx
Installed a 1/4" phono jack & did the wiring.
Just need to do the cap changes now.
Can I run the output of my rack gear straight into this without any kind of isolation?
Re: Sonar FS-2340
Posted: Tue Feb 27, 2018 3:18 pm
by Goldfinger
C71 should block any DC but if you want you could put a blocking cap at the jack. It's a fairly high impedance circuit so a 4.7uF should be plenty big.
Re: Sonar FS-2340
Posted: Thu Mar 22, 2018 6:25 pm
by ShadeTreeMechanic
I recently got a 2340 also. The clipper board has already been removed and bypassed. So I can just plug it into the mic jack, 10-4
Thanks!
- WIN_20180216_132653.JPG (174.41 KiB) Viewed 2391 times