Search results

The resistor between C187 and C191 is R235, which is a 15K, I assume this is the one your talking about. R238 is between C191 and VR13. Thanks, I also pm'ed you as well.

The main purpose is AM (with the 66v). Then on my other 3600 radios (99, saturn, etc..) I use ssb. My main goal is for AM response. Thanks

Hi DTB, I just want better fidelity and a wider frequency range for AM use for use as well with my full range mics, as the range of the radio is speced at 450-2500hz which I feel needs to be widened for more fuller, articulate sound. I have been studying the schematics for awhile but dont...

exactly, I want to widen AF for both AM and SSB use for more of the "hi-fi" sound, which isnt going to happen as much with a 450-2500hz response, wheras a unit with <300-3000+ response would be better suited, however I only use 3600 boards for 11meters as my other radios do not work well on...

Because I want to do this as a project for my station with a couple of my Heil and Shure mic setups. If you feel better to tell this to me via pm, thats cool. I just want a wider fresponse with these mics and some things I want to try with my tube eq and dsp eq mic setups. Thanks

Dear Techs, (DTB? Justin?) I am wondering how to widen the TX Audio Bandwidth frequency response of a Galaxy 66v mobile (or any of those boards as the input mic preamp circuit is pretty much the same across the board. The specs say its 450hz-2500hz transmitter response and I want to go lower...

Just thought I would share this link and info on this new radio to be released soon. An online store already has it priced at $169. http://www.rangerusa.com/ss-39.html

I have the Mr. Coily Enforcer .64 and it creams the antrons/imax and maco v58/v5000, with ease. I have dumped over 10KW bird into it with no problems. I calculated it has about a 4x mult. factor since it is a very efficient antenna, it has positive gain (forget your textbook theorys, I test with...

yes, Steel. Or in non-11 meter terms, ceramic/metal power triodes or tetrodes

Is anyone running steel tubes in the base here? I find it is so much cleaner than running pills, and the smell of steel tubes warming up the room is great. Anyone got any pics of internals of custom made steel boxes?

They are still used today.. I looked at my Mark 4A schematic, and the signal goes right to those for receive first, I bet any money its those... Its good to have a extra set around. My old tech told me if I ever lost receive, replace those 6SD4's first and 90% of the time it fixes the...

Try replacing the two Nuvistors in the caged section of the radio. They are 6DS4's. I was told if I ever had this problem (I own the Mark 4A) that look at those tube little tubes first. I hope this helps!

I would like to know how to get the bassy sound out of the Cobra 200GTL (2290's) version I have. It pissed me off. It sounds like a old cb or something. My superstar and other radios sound clear, the cobra 200 sounds muffled in comparison. I have all the updates that are published on the web. I...

Cobra doesnt even make those radios!!