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[N2MIR]

I just bought a brand new SM-26 desk microphone. Have the volume control turned all the way up. The audio reports have been poor since I have been told it needs more gain. The V8000 seems to have no internal mic gain control. I have to talk right up into it like a hand mic for good transmit audio. Any ideas of how to improve it?

[W0CKI]

The V8000 is a VHF/UHF radio. Did you ask a knowledgeable Icom rep if that mic was suitable for that radio?
Gary W0CKI

[WA3SKN]

Not compatible.
The V8000 uses a dynamic 600 ohm microphone... the HM133v.
SM26 mic is " Compatible radios also use HM-100N, HM-148 and HM-152T hand microphones "....
This is an electret mic with a different pinout and for their trunking radios systems.

-Mike.
 

[WW5F]

I'm pretty sure the HM-133V is an electret microphone.

https://www.dxengineering.com/parts/ico-hm-133v

And DX engineering says the SM-26 is compatible with the V8000.

https://www.dxengineering.com/parts/ico-sm-26

The SM-26 should work.  I would suggest cleaning the RJ-45 connection--both the female and male connections with DeOxit or Alcohol and trying again.  If it's actually a  *used* SM-26 (even though they told you it was new), I'd clean out all the dried spit on the front of the microphone element next.

I've successfully connected a variety of microphones using a homebrew 12AX7 microphone preamp.  Of course, ya gotta know pinouts and what type of microphone you're using.  A dynamic needs just about all the gain a 12AX7 can provide to drive my V8000 to normal deviation.

[WA3SKN]

It is interesting that the Icom website shows it NOT compatible and the DX Engineering site says it IS compatible.  Someone's site is "dated".  Hope it works for you.

-Mike.

[N2MIR]

Just got an email from Icom tech. The SM-30 will work on the v8000