I haven't used a hand mic in years so I'm not looking for a power mic or a n/c mic, I was just stating the obvious.
-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
D104M6B some bad reports.
- Thread starter hammer0630
- Start date
I little further away and turn it down
Robb's comments are spot on the mark.
I own two of these. One is wired for 5 pin DIN Realistic/Radio Shack radios. The other is wired for 4 pin Uniden. They perform very well. For reference, I have a whole collection of Turner Super Side Kicks, Turner +3 base mics, Johnson desk mics (basically a Turner +2 in a +3 body) and others to compare them against.
I never remove the modulation limiter from any radio. The resulting distortion horribly denigrates signal integrity. These mics are excellent run at about 1/2 level when speaking into them from a distance of 4" to 12". It is when you "eat the microphone" or crank the gain too high that people have problems with them.
They do tend to sound trebly, but that suits my voice fine. No clipping/snipping for my mics.
Know thy radio. Know thy mic.
Robb's comments are spot on the mark.
I own two of these. One is wired for 5 pin DIN Realistic/Radio Shack radios. The other is wired for 4 pin Uniden. They perform very well. For reference, I have a whole collection of Turner Super Side Kicks, Turner +3 base mics, Johnson desk mics (basically a Turner +2 in a +3 body) and others to compare them against.
I never remove the modulation limiter from any radio. The resulting distortion horribly denigrates signal integrity. These mics are excellent run at about 1/2 level when speaking into them from a distance of 4" to 12". It is when you "eat the microphone" or crank the gain too high that people have problems with them.
They do tend to sound trebly, but that suits my voice fine. No clipping/snipping for my mics.
Know thy radio. Know thy mic.
I also played around with the tinny audio output.
I found that by clipping the 270K resistor, the bass response was very much improved.
However, if you get long winded, by clipping the resistor, it will overdrive the amplifying transistor, causing it to shutdown until the transistor cools back down.
I have experienced this very issue on no less than 6 different D104M6B microphones.
So I went back to the schematic for the original microphone. A 1.5 Mohm resistor is across the mic element contacts.
That is what I did. I replaced all the "clipped" 270K ohm resistors with a 1/4 watt, 1.5M ohm resistor.
And it has been performing very well. Bass response is greatly improved, and I have not seen any more transistor shutdown issues.
This has worked for me and all the other D104M6B mics that I have modified this way.
Hope this helps.
I found that by clipping the 270K resistor, the bass response was very much improved.
However, if you get long winded, by clipping the resistor, it will overdrive the amplifying transistor, causing it to shutdown until the transistor cools back down.
I have experienced this very issue on no less than 6 different D104M6B microphones.
So I went back to the schematic for the original microphone. A 1.5 Mohm resistor is across the mic element contacts.
That is what I did. I replaced all the "clipped" 270K ohm resistors with a 1/4 watt, 1.5M ohm resistor.
And it has been performing very well. Bass response is greatly improved, and I have not seen any more transistor shutdown issues.
This has worked for me and all the other D104M6B mics that I have modified this way.
Hope this helps.
What decade was the last decade you had anything to do with 2 way radio? It has been at least 1 decade maybe 2 decades since that mic was worth owning! A lot changes in 10, 20, 30 years! Please tell me you can use a debit card to pay at the pump and are not paying your bills over a land line! TO be honest no powered microphone available for sale currently on the market geared at CB'er's is worth owning! None! If anyone tries to tell you otherwise they are probably in sales and want to sell you something! I am sure someone will point you in the direction of some RFlimited Echo Master 10,000 Super Duper Microphone as their is not much left.
If not already done do the resistor mod and recap the radio. Put a decent mic on it and call it a day. If not for use in a mobile get yourself a nice Ukrainian EQ/Compressor,Noise Gate/Audio Amp unit for it off ebay and than any mic you use will be better than a cheap power mic. If you are handy with a iron consider converting to electret condenser and sending power up the mic cord to power it! It makes an old school power mic sound like a soup can with string by comparison!
I would say the days of taking a HR2510 and slapping a Minute Man Estatic Mic on it are long gone as in 1990's gone! One of my friends in the Army went by Ruber Chicken at Ft. Stewart and he had that setup. Not sure if it was HR2510 or President Lincoln but it had the MRF477 final and a Minute Man D104M6B and that was a nice setup! Almost as mice as my Lincoln with MRF455 final.
Take care of your HR2510 they do not build them like they used too especialy if you are into SSB!
It will not be a good one. Switches stick and make a clank sound. They are a loud microphone. Should have did som research before buying.
The switch is the weak link. It becomes noisy over time. Oddly enough, typical contact cleaner does not work as well or last as long as the WD-40 trick.
unfourtanly in 2019 theres not a whole lotta mobile power micsd out there anymore to choose from brand new.. now if ya would,ve went looking for used mic i recommend a astaic 575 or a handheld tuner [cant remember mode numer] but its a plus 2 handheld ..there nice too. or find a d104m6b or c made by astatic
It's marked on the board.
It's right at the end of the connector where the cable attached to the header pins.
Http://worldwideDX.com/threads/d104m6-vs-d104m6.252415/page-2#post-708216
It's right at the end of the connector where the cable attached to the header pins.
Http://worldwideDX.com/threads/d104m6-vs-d104m6.252415/page-2#post-708216
Last edited:
I did the same inadvertently with a pc122. Someone had turned the amc up pretty heavily as far as modulation goes. I did not know this. Even an sra-198 would make it sound like garbage due to over modulation. But, I could run the M6B just cracked open and sound like the bees knees, with no other noises interfering. I kind of wish I had not screwed that screwed up setting up.. 