Search found 70 matches

by 479tx
Thu Feb 28, 2013 6:22 pm
Forum: rx and tx mods
Topic: Galaxy DX-99v
Replies: 4
Views: 1019

Thank you 426!
by 479tx
Thu Feb 28, 2013 5:22 pm
Forum: rx and tx mods
Topic: Galaxy DX-99v
Replies: 4
Views: 1019

Galaxy DX-99v

Looked around, hope I'm not missing an existing post.

RX/TX mods for Galaxy DX-99v?

Also do these radios do OK direct injected?
by 479tx
Wed Feb 20, 2013 1:49 pm
Forum: rx and tx mods
Topic: AMC timing cap C87 in trc-457 and other 858, SSB chassis
Replies: 3
Views: 670

Thank you sir!
by 479tx
Wed Feb 20, 2013 1:49 pm
Forum: rx and tx mods
Topic: AMC timing cap in Cobra 25/Uniden 68?
Replies: 1
Views: 543

AMC timing cap in Cobra 25/Uniden 68?

I know the AMC timing cap is c71 in the 29, anyone know what the cap is in the 25/Uniden 68?

Thanks!
by 479tx
Thu Feb 14, 2013 12:07 pm
Forum: rx and tx mods
Topic: AMC timing cap C87 in trc-457 and other 858, SSB chassis
Replies: 3
Views: 670

Staring at the schematic it looks like the AMC timing cap. Can anyone confirm? I've seen a guy that's written a lot about these radios claiming you want to increase the value of this cap but in almost every other radio I've seen you decrease the value of the AMC timing cap for a snappier AMC and mor...
by 479tx
Thu Feb 14, 2013 11:20 am
Forum: rx and tx mods
Topic: AMC timing cap C87 in trc-457 and other 858, SSB chassis
Replies: 3
Views: 670

AMC timing cap C87 in trc-457 and other 858, SSB chassis

I noticed in the Realistic 858 radios c87 is 2.2uf and in the 139 XLR (same board) c87 is 10uf. Anyone have any idea what this cap does to the AMC circuit? I also noticed the 139 XLR has a diode @ d23 and the TRC-457 has a 220 ohm resistor. On someone else's advice I changed the resistor to a 1n914 ...
by 479tx
Wed Feb 13, 2013 9:35 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: opening up the Uniden/President Washington audio
Replies: 23
Views: 2834

Oh yeah, and did you do the two "want more treble" caps on his Madison?

Thanks for the info and all you contribute goldfinger!
by 479tx
Wed Feb 13, 2013 9:17 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: opening up the Uniden/President Washington audio
Replies: 23
Views: 2834

Sweet! That's what I'm going to do on my 457.

Can you still sound OK with the d21/d22 combo bypassed (mine is w/ a 4.7 resistor in between) as long as you don't overdrive the mic?

The thing wouldn't make much audio until I did that.
by 479tx
Wed Feb 13, 2013 1:24 pm
Forum: rx and tx mods
Topic: trc-457
Replies: 1
Views: 501

trc-457

Can you widen the RX on these 858 TRC-457 radios? Seems pretty narrow and tinny stock. I noticed it doesn't have a 455 filter, just a 7.8.

Saw the cap mods in a different part of the forum for the TX mods, thanks goldfinger.
by 479tx
Wed Feb 13, 2013 1:20 pm
Forum: >>> HIGH FIDELITY AUDIO Q and A <<< POST QUESTIONS AND COMMENTS HERE!
Topic: opening up the Uniden/President Washington audio
Replies: 23
Views: 2834

How do these mods sound with a non-hifi mic like a Silver Eagle d104? Does it still enhance the sound? P.S. On the TRC-457, two components are different (for all realistic model 858 radios) for whatever reason than the original design (that the 139 xlr, etc. use) - D23 is a resistor - replace this w...

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