Search found 94 matches

by 479tx
Sat Feb 18, 2023 11:13 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Road Devil Astatic Help Me Goldfinger
Replies: 4
Views: 419

Re: Road Devil Astatic Help Me Goldfinger

DoctorMike,

Did you ever try this? Was there any noticable improvement?
by 479tx
Sat Feb 18, 2023 11:06 pm
Forum: rx and tx mods
Topic: Anytone 5555n II
Replies: 2
Views: 275

Re: Anytone 5555n II

Will do, Goldfinger!
by 479tx
Mon Feb 13, 2023 11:19 am
Forum: rx and tx mods
Topic: Anytone 5555n II
Replies: 2
Views: 275

Anytone 5555n II

Anyone have a schematic for the new AnyTone 5555n II (new board, same as 955 v2, CRT 7900, 5555 plus, KPO 5000) was hoping to get GoldFinger's help finding which caps to fatten up for wider RX/TX on this radio.
by 479tx
Tue Mar 16, 2021 9:58 am
Forum: rx and tx mods
Topic: Anytone AT-6666 (Quad 6) hifi
Replies: 18
Views: 3250

Re: Anytone AT-6666 (Quad 6) hifi

Thanks, Goldfinger!
by 479tx
Fri Mar 12, 2021 12:20 am
Forum: rx and tx mods
Topic: hifi rx/tx mods for Stryker 497hpc?
Replies: 5
Views: 1383

hifi rx/tx mods for Stryker 497hpc?

Goldfinger or anyone else,

What cap mods would you make to a Stryker 497HPC to open up bandwidth on rx and tx?

Thanks!
sr_447_sr_497_hpc_sch.pdf
(210.4 KiB) Downloaded 48 times
by 479tx
Wed Jan 01, 2020 12:05 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

This mod seems to work excellent. I can definitely tell a difference in low-end frequency response on my modified M+3 vs. stock when running them on a 29 modified for wide transmit. Excellent!
by 479tx
Sun Dec 29, 2019 4:33 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

Thanks so much, GF! I'm going to mod one of my M+3's tonight!
by 479tx
Fri Dec 06, 2019 10:10 am
Forum: rx and tx mods
Topic: Tram D201A?
Replies: 3
Views: 928

Re: Tram D201A?

Thank you. I had seen that thread but wasn't sure 201/201A were the same in the right places. I'll go study schematics now :)
by 479tx
Thu Dec 05, 2019 1:30 pm
Forum: rx and tx mods
Topic: Tram D201A?
Replies: 3
Views: 928

Tram D201A?

Hi GF,

Been away from the radio stuff for a bit but have a new radio I want to bless with better audio. Do you know the caps to fatten up on a Tram D201A RX & TX?

Thanks as always and happy holidays
479tx
by 479tx
Thu May 23, 2019 9:58 pm
Forum: rx and tx mods
Topic: Request - Stryker 955 cap mods
Replies: 26
Views: 7452

Re: Request - Stryker 955 cap mods

What are the smallest/lightest caps for the replacements that don't call for E caps I could use here? I'm thinking trim & bend the leads to be short where I can put a bit of glue/cement to hold the cap down to the board once it's soldered to the existing SMT part.
by 479tx
Wed May 15, 2019 8:38 pm
Forum: rx and tx mods
Topic: Request - Stryker 955 cap mods
Replies: 26
Views: 7452

Re: Request - Stryker 955 cap mods

Thank you sir! This will be quite the project
by 479tx
Wed May 15, 2019 8:23 pm
Forum: rx and tx mods
Topic: Cobra 29 - C125
Replies: 2
Views: 856

Re: Cobra 29 - C125

:oops: Didn't even realize the obvious answer. I was thinking more along the lines of subtle differences between the audio chips bandwidth. Thanks
by 479tx
Wed May 15, 2019 6:17 pm
Forum: rx and tx mods
Topic: Cobra 29 - C125
Replies: 2
Views: 856

Cobra 29 - C125

GF,

Why do you recommend changing C125 on the newer Corbra 29s and not the older ones?

I was doing up a Mfg. in 2003 Dale E. Cobra 29 w/ old style audio chip today and wondering...
by 479tx
Mon May 13, 2019 11:00 pm
Forum: rx and tx mods
Topic: Request - Stryker 955 cap mods
Replies: 26
Views: 7452

Request - Stryker 955 cap mods

If someone would be so kind... (I searched but didn't see anything)

What caps do you need to fatten up to make the tx/rx wide on a Stryker 955?

Link to super annoying multi-level schematic (only one I can find):
Schematics.pdf
(314.19 KiB) Downloaded 74 times
by 479tx
Mon May 06, 2019 8:51 am
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

Not a problem sir! Take care of your health. Hoping you have a speedy recovery.
by 479tx
Fri May 03, 2019 8:58 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

Breaker, Breaker Goldfinger... Was your mic stuck together? :) I found two cherry JM + 3 mics would love to fatten the audio up.
by 479tx
Mon Apr 29, 2019 8:21 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Echo board with widest response?
Replies: 1
Views: 1447

Echo board with widest response?

I've noticed the echo board in the Stryker 955 seems to clamp down on the audio bandwidth a bit when it's on vs. when it's off (at least with my ears) I was thinking it may be a good mod to install an aftermarket echo board with a wider response (or at least easier to modify with through-hole parts)...
by 479tx
Sun Apr 28, 2019 10:36 am
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

Thanks GF!
by 479tx
Wed Apr 24, 2019 4:58 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

The electrolytics are 2uf, 2uf, 5uf
by 479tx
Wed Apr 24, 2019 4:55 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

20190424_174823mic.jpg
20190424_174823mic.jpg (3.97 MiB) Viewed 4817 times
20190424_174818mic.jpg
20190424_174818mic.jpg (3.9 MiB) Viewed 4817 times
20190424_174809mic.jpg
20190424_174809mic.jpg (2.73 MiB) Viewed 4817 times
by 479tx
Wed Apr 24, 2019 4:55 pm
Forum: rx and tx mods
Topic: Turner M+3 mic and M+2U
Replies: 21
Views: 5278

Re: turner m+3 mic

I finally pulled mine apart. There are 3 electrolytic caps in addition to some other types. GF - you able to discern from this pic which ones to fatten up?
20190424_174758mic.jpg
20190424_174758mic.jpg (3.08 MiB) Viewed 4817 times
20190424_174732mic.jpg
20190424_174732mic.jpg (3.04 MiB) Viewed 4817 times
20190424_174723mic.jpg
20190424_174723mic.jpg (2.85 MiB) Viewed 4817 times
by 479tx
Mon Apr 22, 2019 9:05 pm
Forum: rx and tx mods
Topic: VFO wind up for Stryker 955?
Replies: 9
Views: 2502

Re: VFO wind up for Stryker 955?

You guys are awesome. Thanks for digging!
by 479tx
Thu Apr 18, 2019 1:49 pm
Forum: rx and tx mods
Topic: VFO wind up for Stryker 955?
Replies: 9
Views: 2502

Re: VFO wind up for Stryker 955?

Interesting! I thought it was just the 500 roger beeps that were microprocessor controlled in this radio, LOL. Thanks for the reply, Goldfinger!
by 479tx
Wed Apr 17, 2019 10:11 pm
Forum: rx and tx mods
Topic: VFO wind up for Stryker 955?
Replies: 9
Views: 2502

VFO wind up for Stryker 955?

Hey GF - or anyone reading this.

Can someone tell me how I'd go about adding a VFO wind up toy (cap) to a Stryker 955? I'm about to do up a Stryker 955 with optional Direct Inject and I think it'd be cool to have a VFO wind up on a switch.
Schematics.pdf
(314.19 KiB) Downloaded 26 times
Thanks!
by 479tx
Sun Mar 11, 2018 8:50 pm
Forum: rx and tx mods
Topic: Cobra 29 LX - C43?
Replies: 3
Views: 1693

Cobra 29 LX - C43?

I was just working on a Cobra 29 LX mfg. in 2014 that has spot marked for C43 (near L3) but has no part in the spot. C43 is part of the TX side of the hifi mods for the 29. Should I put a part in this spot in this situation or leave it blank like I found it? (This was a factory new radio) Thanks for...
by 479tx
Thu Mar 01, 2018 6:26 pm
Forum: rx and tx mods
Topic: Cobra 29 AMC & Hifi
Replies: 4
Views: 3594

Re: Cobra 29 AMC & Hifi

Thanks, Goldfinger!

Do you run the JP36 mod on your wide 29?

I will try the C73 experiment out and let you know what I find.
by 479tx
Thu Mar 01, 2018 1:02 pm
Forum: rx and tx mods
Topic: Cobra 29 AMC & Hifi
Replies: 4
Views: 3594

Cobra 29 AMC & Hifi

Goldfinger, I know I've read that you prefer keeping the AMC in tact and setting it so it's still limiting just a little (~105% modulation) rather than completely disabling with the hifi mod. Reason being that the mod transformer has bad response below 100hz and severely clipping/overmodulating with...
by 479tx
Thu Mar 01, 2018 12:56 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 19
Views: 12554

Re: Turner +3 widen audio?

Awesome info! Thank you for the reply.
by 479tx
Tue Feb 27, 2018 8:53 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 19
Views: 12554

Re: Turner +3 widen audio?

What effect would making this cap smaller in value, like he suggests (possibly because he couldn't find one closer to the original, or make it fit?) 1x 2.2uF MKC 1862 poly type capacitor (replaces 5uF from volume control wiper to white wire audio output) Would it decrease low bass frequencies? I see...
by 479tx
Tue Feb 27, 2018 8:11 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 19
Views: 12554

Re: Turner +3 widen audio?

That makes sense. I happened to stumble across this thread on worldwidedx.com, this guy talks about replacing the caps in a Turner +3 with high end audiophile type caps to make the mic sound better than stock (so he says) --- Rebuilding the microphone to sound better than new only requires a few sel...

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