Search found 402 matches

by Goldfinger
Sat Apr 28, 2018 2:30 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Browning Golden Eagle Mark 3
Replies: 6
Views: 806

Re: Browning Golden Eagle Mark 3

Sorry about the delay, I had a bunch of things come up that had to be done. Finally have a free minute. Thanks 31 for the info from Grumpy's.. https://i.imgur.com/mbBHGCS.jpg It takes nearly 5 volts peak to drive the 6BQ5 grid directly. Because line level is much lower than this you would need an au...
by Goldfinger
Thu Apr 19, 2018 2:11 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Browning Golden Eagle Mark 3
Replies: 6
Views: 806

Re: Browning Golden Eagle Mark 3

This post is fine for the mark 4 but the mark 3 though very similar has completely different part numbers.
I've been very busy for the past few days so I haven't had a chance to check but I'll still look at the schematic soon and see what I think.
by Goldfinger
Fri Apr 06, 2018 11:38 am
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: Browning Golden Eagle Mark 3
Replies: 6
Views: 806

Re: Browning Golden Eagle Mark 3

This looks like a post I somehow missed. I'll find a schematic and post up the info.
by Goldfinger
Sun Mar 25, 2018 3:27 pm
Forum: rx and tx mods
Topic: Galaxy 99v2
Replies: 5
Views: 1575

Re: Galaxy 99v2

Comparing schematics it looks like C158 is the same as C133 on the Connex
by Goldfinger
Tue Mar 20, 2018 4:22 pm
Forum: rx and tx mods
Topic: magnum delta force
Replies: 6
Views: 1945

Re: magnum delta force

Yes, I FU'd... sorry Should be 299, yes. I'll edit the post I think "grimace" got some of them wrong. The newest list I posted was researched by me yesterday. Other than my C299 mistake it is the guide to follow. Ignore the previous posts other than using the S45 schematic as it is easier ...
by Goldfinger
Mon Mar 19, 2018 8:23 pm
Forum: rx and tx mods
Topic: magnum delta force
Replies: 6
Views: 1945

Re: magnum delta force

Receive: Change C146 to a 22uF, 16 volt electrolytic, observe polarity. Change C144, C148, C298, C299 to 2.2uF mylar, polypropylene or non-polar electrolytic. Change C279 to a 2.2uF, 16 volt electrolytic, observe polarity Change C293 to a 1000uF, 25 volt electrolytic, observe polarity. Transmit: Ch...
by Goldfinger
Tue Mar 13, 2018 10:59 am
Forum: rx and tx mods
Topic: Cobra 29 LX - C43?
Replies: 1
Views: 151

Re: Cobra 29 LX - C43?

I did a search and I'm not finding any reference to C43 except in your post.
by Goldfinger
Thu Mar 01, 2018 8:19 pm
Forum: rx and tx mods
Topic: Cobra 29 AMC & Hifi
Replies: 4
Views: 317

Re: Cobra 29 AMC & Hifi

I am. I like to tune L14 for maximum peak power on 29/25's always. As such, this radio was doing a little over 5 dead key. My amp required 3 watts to dead key where I wanted it so I dropped it a little. On the C73 thing, feel free to try higher values if changing to 2.2uF doesn't do much. After all,...
by Goldfinger
Thu Mar 01, 2018 4:56 pm
Forum: rx and tx mods
Topic: Cobra 29 AMC & Hifi
Replies: 4
Views: 317

Re: Cobra 29 AMC & Hifi

The cap value of the JP36 mod does affect the tone if it's too small, mostly because the radio is responding much lower from the hifi mod. Making it too large makes the RMS swing kinda "whippy" though, so I usually use a 470uF to allow the lows to peak as high as the mids while not being s...
by Goldfinger
Wed Feb 28, 2018 5:04 pm
Forum: rx and tx mods
Topic: Cobra 146GTL hi fi
Replies: 0
Views: 177

Cobra 146GTL hi fi

Receive: C25,C29 change to 2.2uf mylar, polypropylene or non-polarized electrolytic C142 to a 2.2 or 4.7uF electrolytic or tantalum, observe polarity C138, C139 Change to 4.7uf mylar, polypropylene or non-polarized electrolytic Change C132 to a 1000uF, 25 volt electrolytic, observe polarity More hi...
by Goldfinger
Wed Feb 28, 2018 1:53 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 18
Views: 3392

Re: Turner +3 widen audio?

Yeah, though I agree that using esoteric caps do make an audio signal "sound" better, it's usually only noticeable on a high end home stereo level when using speakers with good resolution. I've been using high end caps for decades in home stereo pre-amps, power amps and speaker crossovers....
by Goldfinger
Tue Feb 27, 2018 3:22 pm
Forum: rx and tx mods
Topic: Turner +3 widen audio?
Replies: 18
Views: 3392

Re: Turner +3 widen audio?

The higher load resistance changes the roll-off of the high impedance ceramic element allowing it to respond a little lower. Doesn't really change the gain much. Same trick people have been doing to the handheld D-104's to make them sound fuller.
by Goldfinger
Tue Feb 27, 2018 3:18 pm
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 8
Views: 387

Re: Sonar FS-2340

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.
by Goldfinger
Sat Feb 24, 2018 5:54 pm
Forum: rx and tx mods
Topic: turner m+3 mic
Replies: 3
Views: 210

Re: turner m+3 mic

It might say 300 but I swept mine and it goes lower.
That manual has the wiring diagram but the amp is depicted as a triangle only and has no detail.
by Goldfinger
Fri Feb 23, 2018 6:00 pm
Forum: rx and tx mods
Topic: turner m+3 mic
Replies: 3
Views: 210

Re: turner m+3 mic

As there is no schematic of the amplifier, I did it by studying the PC board and changing a few caps. They actually have a wider response stock than any other Turner (base or mobile) or stock amplified D-104. It responds down to 80hz well from the factory. The only stock CB powermic that goes lower ...
by Goldfinger
Thu Feb 22, 2018 12:06 pm
Forum: rx and tx mods
Topic: Uniden PC-122, PC-122XL
Replies: 6
Views: 2089

Re: Uniden PC-122, PC-122XL

I'll have some time today and tomorrow, I'll post it soon.
by Goldfinger
Thu Feb 22, 2018 11:38 am
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 8
Views: 387

Re: Sonar FS-2340

Disconnect the coax from points 105 and 106 on the clipper board output and direct inject the coax. sonar 2340 clipper.jpg 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 electro...
by Goldfinger
Wed Feb 14, 2018 1:49 pm
Forum: rx and tx mods
Topic: Uniden PC-122, PC-122XL
Replies: 6
Views: 2089

Re: Uniden PC-122, PC-122XL

I never posted up the 146GTL mods. I'm busy for a couple days but I'll take a look at the schematic when I get a minute.
by Goldfinger
Mon Feb 12, 2018 10:19 pm
Forum: rx and tx mods
Topic: Sonar FS-2340
Replies: 8
Views: 387

Re: Sonar FS-2340

Looks like it would be easier to inject after the clipper. I'll write up how tomorrow or the next day.
by Goldfinger
Mon Feb 12, 2018 10:04 pm
Forum: rx and tx mods
Topic: Galaxy 900 series radios 919 through 979
Replies: 8
Views: 3647

Re: Galaxy 900 series radios 919 through 979

Change C155 to a .001uF ceramic disc for more TX highs.
by Goldfinger
Wed Feb 07, 2018 1:21 pm
Forum: rx and tx mods
Topic: Uniden PC-122, PC-122XL
Replies: 6
Views: 2089

Re: Uniden PC-122, PC-122XL

I think the 244 is similar but not the same. I think it's more like a 146GTL
by Goldfinger
Wed Nov 29, 2017 2:48 pm
Forum: rx and tx mods
Topic: Cobra 142GTL cap changes
Replies: 3
Views: 522

Re: Cobra 142GTL cap changes

If you measure which hole is more positive you can but I've found it still doesn't work much of the time as both sides of the circuit have some random + voltage on them and doesn't want to work right. It's easier just to get the right caps. I always use "new" caps when I modify a radio so ...
by Goldfinger
Mon Sep 11, 2017 6:40 pm
Forum: rx and tx mods
Topic: Cobra 142GTL cap changes
Replies: 3
Views: 522

Re: Cobra 142GTL cap changes

Receive: Change C91,C28, C108 and C110 to 2.2uF-4.7uF non polarized Change C 118 to a 1000uF, 25 volt Electrolytic, observe polarity More highs? Make C25 lower in value Transmit: Change C121 to a 4.7uF, 16V Electrolytic or Tantalum, observe polarity Change C86 and C82 to 2.2uF-4.7uF non polarized M...
by Goldfinger
Wed Sep 06, 2017 1:42 pm
Forum: rx and tx mods
Topic: 25LX
Replies: 3
Views: 376

Re: 25LX

Yes, finally back to normal. Thanks
by Goldfinger
Wed Sep 06, 2017 8:19 am
Forum: rx and tx mods
Topic: Uniden HR-2510 RX/TX, hi-fi mods
Replies: 3
Views: 2530

Re: Uniden HR-2510 RX/TX, hi-fi mods

Back hole of C147
by Goldfinger
Mon Sep 04, 2017 8:11 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 702

Re: Realistic TRC-465

Thanks
by Goldfinger
Mon Sep 04, 2017 3:25 pm
Forum: rx and tx mods
Topic: 25LX
Replies: 3
Views: 376

Re: 25LX

Receive: C32, C56: change to 2.2uF Non-polarized RX/TX: C67: Change to a 1000uF, 25 volt electrolytic, observe polarity Transmit: C97: change to a .001uF disc or mylar C90: change to a 1.5uF - 2.2uF 16V Tantalum or electrolytic, observe polarity C89: change to somewhere between .068uF to .22uF Beca...
by Goldfinger
Fri Sep 01, 2017 8:34 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 702

Re: Realistic TRC-465

Transmit: C111: Change to 2.2uF-4.7uF, 25 volts or greater, non-polarized C108: This cap is for positive feedback so making it smaller shifts the boost frequency higher. Change to .005uF, 16 volt or greater disc or Mylar C104: This is the SSB Bal-Mod cap. Change to a 1uF-2.2uF 25 volts or greater, ...
by Goldfinger
Fri Sep 01, 2017 3:42 pm
Forum: rx and tx mods
Topic: Realistic TRC-465
Replies: 8
Views: 702

Re: Realistic TRC-465

I wish people would scan schematics with at least 150dpi. It's a waste of time to post blurry ones. (I'm not talking about you a365) So many of the schematics at cbtricks are low res. This one looks like 50dpi or less... lol
I'm looking now and will post soon. Thanks for the schematic :mrgreen:
by Goldfinger
Tue Aug 29, 2017 10:09 am
Forum: rx and tx mods
Topic: direct injection on a Cobra 29 LX
Replies: 25
Views: 4916

Re: direct injection on a Cobra 29 LX

If you just want it hi-fi through the mic jack, the 29LTD mod on the forum is the ticket.

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