... Most folks radios are unable to reproduce this sound. I've been to the best techs in the country and none have been able to reproduce this type of audio frequency response and fidelity tuning an export radio.
Sounds excellent to me and very intelligible.
Mark can do surface mount part changes, sweet.
His tunes look awesome; mean is clean, no doubt.
Once someone knows how the filtering works in an audio circuit, and learns what the "GoldFinger Hi-Fi mod" (from EPT3600 or newer version) is all about.
All they have to do is apply the idea on a newer export board.. There are some audio frequency response gains to be had, if you know what parts to change and how to install them. This would be challenging if no schematic was available.
But, anybody who cares enough to trace out the circuit, can increase the audio frequency response in just about any CB set. (After a better mic)
Will Mark Hi-Fi my Realistic TRC-444 for me? Doubt it. Could he, yes he could after some tech investigation. . But he won't go out of his way to work on your butchered Cobra from 1970's.. At least that is what I gather from my observation of him.
I'm not saying Mark doesn't have over 100+ hours tracing circuits out and developing this mod all by himself, but I'm pretty sure I've heard him say online that he only works on radios he can get a schematic for.
A technician does not need to
only service a select few (radios), unless they cannot produce acceptable results with
radios using a different circuit board design.
Or perhaps it fits his very efficient personality, you know: Doing the great (repeatable) work as quickly as possible, no time for odd radios that don't fit the cookie-cutter program.
The "secret sauce" has been discovered by Mark, after all if one connects the dots they can work out what it takes to "open the audio up", no I am not talking about modulation, only frequency response.
A good tech can make the driver stage linear, as Mark says it's all in the bias.
(Very few that promote online will ever go this far for a radio tune, most can't)
He picks his customers, I am sure of it. Who hands someone a masterpiece to see it clipped and snipped, no one. Never again shall I cast pearls before the "undeserving or unenlightened".
Ever see something you had a lot of pride in, get destroyed after it was sold because some idiot couldn't "make it swing right", (haha nevermind the 125% asymmetry), he needed a squarewave monster that rattles the dosy meter.. Too bad his "tech" couldn't see the custom bias circuit I used in the driver stage, no wonder he said the finals are bad, it didn't act like a mixed class C shit box.
That's why I lose more interest in this scene as the days go on. (watt meter tuning)
Good clean work is not loud enough, and the other end of the spectrum is "tree-top-tall" dirty... Guess you really can't please everyone.
Best Regards to Fine Tune CB Shop & the whole WorldWideDX crew