stock mikes

[1iwilly]

well, time to update my stock mikes elements is the higher the impedance the better response and clearer sound. I have 4 of them 1 reads 500 ohms 3 reads 450 ohms 1 reads 150 ohms i'm looking at to new elements 1=

• Sensitivity: -70+/- 3dB (at 1KHz)
• Impedance: 500 ohm
• Frequency Response: 300~6KHz
• 2nd one=
• Element Type: Dynamic Moving Coil
  Pattern: Cardioid
  Impedance: 500 Ohm
  Freq. Resp: 100 Hz - 12000 Hz
  Sensitivity: -76 db +/- 3db
  S/N Ratio: >65 db

 

[sp5it]

Swap to electret and no more issues.

 

[1iwilly]

Swap to electret and no more issues.

they are all handheld mike non amplified

 

[sp5it]

That's not a problem.
You need electret capsule and small mod inside radio.
Add 1 resistor and 1 capacitor.

 

[1iwilly]

That's not a problem.
You need electret capsule and small mod inside radio.
Add 1 resistor and 1 capacitor.

and where can a lost soul find such valuable info if you don't mind directing me to that so call info i only use cobra radios 2k and 148 gtl

 

[sp5it]

Cobra 148
8V is present in many places inside the radio.
Cobra 2k tomorrow, It's after midnight here

 

[guitar_199]

Cobra 148
8V is present in many places inside the radio.
Cobra 2k tomorrow, It's after midnight here

THANK you MUCHO for that!!!!!

 

[1iwilly]

just order the electrec mike got one for now to experiment

 

[sp5it]

That Cobra?

Welcome cbtricks.com - BlueHost.com

Bluehost - Top rated web hosting provider - Free 1 click installs For blogs, shopping carts, and more. Get a free domain name, real NON-outsourced 24/7 support, and superior speed. web hosting provider php hosting cheap web hosting, Web hosting, domain names, front page hosting, email hosting...

www.cbtricks.com

 

[1iwilly]

That Cobra?

Welcome cbtricks.com - BlueHost.com

Bluehost - Top rated web hosting provider - Free 1 click installs For blogs, shopping carts, and more. Get a free domain name, real NON-outsourced 24/7 support, and superior speed. web hosting provider php hosting cheap web hosting, Web hosting, domain names, front page hosting, email hosting...

www.cbtricks.com

yes cobra 2000 gtl

 

[sp5it]

Cobra 2000 electret conversion.
Mike

p.s.
It's good to put ceramic cap on electret capsule terminals. 100pF-470pF whatever you have. It will help with unwanted RF issues.

 

[1iwilly]

thanks, sp5it will try out as soon as i get the parts

 

[Alabama Buckeye]

just order the electrec mike got one for now to experiment

I obtained the Threesome offering from likely the same fleebay seller. Sponge was far too large to properly orient electret elements in D-104 Mic Head. Manufactured disk from ABS plastic and drilled holes through the 1/4" ABS thickness. Perfectly aligned elements to front facing, with a little depth to spare.

The seller was not at all forthcoming as to specifications of electret elements.
The kit was successfully installed with the included voltage regulator, presumably a resistor, to trim 9V down to the required voltage; I'm don't know what that voltage is.

 

[1iwilly]

Astatic D-104 “G” stand, (non amplified mics) electret condenser upgrade kit

Astatic D-104 “G” stand non- amplified microphone Hi-Fi electret condenser upgrade kit. This will replace the original crystal or ceramic condensers that break down over time with a powered condenser that will provide crystal clear loud modulation. These will actually create a power mike swing with a non amplified mic. This kit will work on any D-104,(except “K” model mics), however non-amplified mics will require mounting a 9v battery in the base of the mic to power the condenser. The battery connector is included with this kit. The kit requires basic solder skills for installation. It is very easy to install and comes with detailed instructions. The kit includes a prewired electret, a custom built mounting fixture, a voltage regulator with backfeed protection capacitor, and shrink tube for insulation. These kits are fully tested before shipping and guaranteed to perform as described

 

[Alabama Buckeye]

A capacitor it is not resistor. "Custom built mounting fixture", that's ROFLMAO funny. Useless is closer to the truth. You'd be lucky to get a single electret to mount face forward let alone 3 or 5 with this so called "custom build" oversized foam sponge.

A 3" hole saw cut produces 2 7/8"D perfect fitting disk of 1/4"h ABS; for a
D-104 mic. Customizing the ABS disk along its periphery to accommodate the 4 front and back mounting screws and you have rock solid mounting of 1,3, or 5 electret condenser mics.

Had that "Custom built mounting fixture" not exceeded 1/2" in thickness it might likely would have been acceptable. Considering the D-104 depth, not including front face and back plate, ring depth does not exceed 1/2". Clearly not a lot of thought in the "Custom" design past what it looked like on paper.