Search found 59 matches

by 479tx
Tue Feb 13, 2018 8:51 am
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 3
Views: 15

Re: Sonar FS-2340

Thanks GF!

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

479tx
by 479tx
Mon Feb 12, 2018 8:20 pm
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 3
Views: 15

Re: Sonar FS-2340

by 479tx
Mon Feb 12, 2018 5:52 pm
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 3
Views: 15

Sonar FS-2340

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?
by 479tx
Mon Feb 12, 2018 2:25 pm
Forum: rx and tx mods
Topic: Galaxy 900 series radios 919 through 979
Replies: 8
Views: 3178

Re: Galaxy 900 series radios 919 through 979

Thanks for the reply, 31.

I see a cap listed to decrease in value or remove for receive highs... but not for additional highs on TX?
by 479tx
Sat Feb 10, 2018 4:34 pm
Forum: rx and tx mods
Topic: Galaxy 900 series radios 919 through 979
Replies: 8
Views: 3178

Re: Galaxy 900 series radios 919 through 979

This mod lists to caps for adding bass to the TX, but what about more highs?

Radio in question is a Galaxy 2547, but assume these instructions will be the same.

Thanks!
by 479tx
Tue Aug 23, 2016 2:48 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Back swing issue
Replies: 27
Views: 2003

Re: Back swing issue

The Echomax 2000 ended up having enough gain when direct injected just before the audio chip on my Grant, it just didn't sound so great. I wonder now if the guy in DX land that told me that was the mic he was running was kidding now ... Either way, I have tried both rack gear and digital audio from ...
by 479tx
Sun Aug 14, 2016 8:41 pm
Forum: rx and tx mods
Topic: direct injection on a Cobra 29 LX
Replies: 25
Views: 3797

Re: direct injection on a Cobra 29 LX

GoldFinger is the man, that is for sure. Post a gate of the direct injected 29 audio if you get a chance weak station, I'd love to hear it.
by 479tx
Thu Aug 11, 2016 11:51 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Back swing issue
Replies: 27
Views: 2003

Re: Back swing issue

GF, Am I thinking about this right? I want to DI my Grant just before the audio chip and drive it with my Echomax 2000 via the standard microphone plug on the side. Would the following work? - Remove mic audio wire from stock mic jack on radio and replace it with a wire leading to a 10uf a 10UF cap ...
by 479tx
Thu Aug 11, 2016 12:18 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Back swing issue
Replies: 27
Views: 2003

Re: Back swing issue

RPM sounds pretty good in that gate! I talked to a guy in DX land the other day that sounded really good and even with just a widened Cobra 29 receiver could tell he was running wider than stock. Turns out he was running a Galaxy radio, direct injected with an Echomax 2000. It wasn't super bassy but...
by 479tx
Wed Jul 27, 2016 8:16 pm
Forum: rx and tx mods
Topic: How to make non-polarized caps
Replies: 2
Views: 3476

Re: How to make non-polarized caps

Great info, GF!

Thanks
by 479tx
Fri Apr 08, 2016 2:55 pm
Forum: rx and tx mods
Topic: c204 on older Cobra 29?
Replies: 1
Views: 1405

c204 on older Cobra 29?

I'm working on a China made side-mic Cobra 29 LTD Classic that was mfg. in 1995.

I can't seem to find c204 to remove for more highs on receive. I know some years don't have it but can anyone point me to the right place to look for it just to make sure?

Thanks!
by 479tx
Wed Dec 09, 2015 1:48 pm
Forum: rx and tx mods
Topic: Location of C170 on newer model 29
Replies: 5
Views: 2335

Mine is similar but dang if that cap (or a marked place for it) doesn't exist.

There's a small surface mount part in that general area on the under side of the board but it looks like a resistor.

I'll see if I can get my bearings with the traces and that diagram and see if that could be it...
by 479tx
Sat Nov 14, 2015 9:59 pm
Forum: rx and tx mods
Topic: Location of C170 on newer model 29
Replies: 5
Views: 2335

Thanks for the layout pic Goldfinger! My Made in China Mfgr'd in Feb 2014 Cobra 29 LTD classic does not appear to have this cap. It also appears that my board layout is different. The parts in the general area are in slightly different places on my radio. I see R105, R104, d22, c119, etc. Serial end...
by 479tx
Thu Nov 12, 2015 12:46 pm
Forum: rx and tx mods
Topic: Location of C170 on newer model 29
Replies: 5
Views: 2335

Location of C170 on newer model 29

In the stickied post about Cobra 29 cap changes, there is a link to an image that shows the Location of C170 on newer model 29. Unfortunately that image/link is gone now. Can anyone give me some direction on finding c170 in the new style 29 with the new audio chip? I've combed the thing, surely I'm ...
by 479tx
Sat Jun 21, 2014 6:51 pm
Forum: rx and tx mods
Topic: rci 2970n2
Replies: 10
Views: 2176

To those that are curious, You can (if you are careful, and have a steady hand) solder light weight poly or tant caps across the existing caps you're supposed to change (shorten the leads, and bend them like a U shape) with good results! I didn't feel comfortable removing the existing SMT components...
by 479tx
Sat Jun 21, 2014 6:49 pm
Forum: rx and tx mods
Topic: turner expander 500 mods?
Replies: 3
Views: 1606

Thanks Goldfinger,

Going to get this mic back out and give it a shot!
by 479tx
Sat Jun 21, 2014 6:46 pm
Forum: rx and tx mods
Topic: RX cap mods for Galaxy Saturn Turbo?
Replies: 1
Views: 1322

Found it

The mods Goldfinger posted for the 2527 are the same for the Galaxy Saturn Turbo

http://www.wwpdx.com/ForumWWPDX/viewtop ... light=2527

Great info, Goldfinger!
by 479tx
Sun Jun 15, 2014 6:01 pm
Forum: rx and tx mods
Topic: RX cap mods for Galaxy Saturn Turbo?
Replies: 1
Views: 1322

RX cap mods for Galaxy Saturn Turbo?

I searched around but didn't find anything for this exact radio (Did find the direct inject mod, which I intend to try out!) to widen the RX.

My Galaxy Saturn Turbo is essentially the same thing as a RCI 2990.

Thanks!
by 479tx
Sun Jun 15, 2014 5:53 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 12
Views: 2773

I liked the results of this on my Turner +3

Thanks Goldfinger
by 479tx
Sat Jun 07, 2014 7:11 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 12
Views: 2773

I have my old school 148 w/ goldfinger's hifi tx mods and my turner +3 sounds pretty good, was thinking maybe I could change a cap or two in it for a little more low end.

Here's the schematic

http://www.radiomanual.info/schemi/ACC_ ... 3_user.pdf
by 479tx
Fri Jun 06, 2014 9:31 am
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 12
Views: 2773

Turner +3 widen audio?

Anyone know which caps to replace in a Turner +3 to widen the audio response up?
by 479tx
Fri Jan 24, 2014 10:59 pm
Forum: rx and tx mods
Topic: turner expander 500 mods?
Replies: 3
Views: 1606

turner expander 500 mods?

Hi GF, I came into possession of a very nice Turner Expander 500 with a tone control. People's complaint about this mic (although it has a very effective compressor) is that the tone control removes highs as you add lows. It's not really a tone control in the conventional sense. Do you know of any m...
by 479tx
Fri Jan 24, 2014 10:56 pm
Forum: rx and tx mods
Topic: magnum raptor II direct injection point?
Replies: 8
Views: 1768

Thank you GF!
by 479tx
Wed Jan 15, 2014 12:24 pm
Forum: rx and tx mods
Topic: magnum raptor II direct injection point?
Replies: 8
Views: 1768

magnum raptor II direct injection point?

Anyone know where to direct inject a magnum raptor II?
by 479tx
Thu Oct 17, 2013 2:03 pm
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

From the service manual: http://i.imgur.com/TuirQii.png So if the above means what I think it means (that no filter is in place during AM TX) then just a few caps (perhaps the ones you suggested) plus removing the "mic tone" pot on the back of the radio would really open it up?
by 479tx
Thu Oct 17, 2013 1:14 pm
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

Hey Thanks GoldFinger, What do you think about the "tone control" pot - would eliminating it increase usable bandwidth or do the opposite? As stock, it's always inline and turning it all the way clockwise rolls the lows off and turns the highs up, turning it counter clockwise does the oppo...
by 479tx
Wed Oct 16, 2013 7:06 pm
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

Is this forum this slow or is it just that my thread is this uninteresting?

:P
by 479tx
Wed Oct 16, 2013 10:43 am
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

Here's a better copy of the schematic for anyone interested in helping me take a stab at this

It's in this directory, for some reason it doesn't work when I post a direct link to it http://www.w0btu.com/files/misc/Icom/IC-735/IC-735%20Mods%20&%20Service%20Info/
by 479tx
Mon Oct 14, 2013 6:04 pm
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

What if I just took the tone control pot out of the circuitry of the radio?

It seems to roll off highs one way or roll off lows the other way, the lows and highs give in either direction sound good, but I'd like to have them both at the extremes combined.

Any thoughts on the above idea?
by 479tx
Mon Oct 14, 2013 2:20 pm
Forum: rx and tx mods
Topic: fattening stock tx/rx audio bandwidth on IC-735
Replies: 8
Views: 1473

In the service manual is says AM TX does not go through any particular filter if I'm reading this correctly. So changing bypass and coupling caps could yield good results?

http://www.radiomanual.info/schemi/IC735_serv.pdf

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