[Boatanchors] Mic's / RED FLAG

[Greg Mijal]

I'm wondering if something else is not correct with the transmitter's audio 
section.  The D-104 has tons of voltage output due to it's large size.  The 
Kobitone has less voltage out.  The only way a Kobetone would make an 
improvement is if Larry has a bunch of bad d-104 heads.  I suggest driving 
the audio with a signal generator to find the correct amount of audio 
voltage to get the job done, then compare it with the D-104's. The Kobetone 
cartridge is a good way to go for any xtal mic replacment.  I have two hand 
mic's and a re-worked D-104 usiing them and you really cannot tell the 
difference on the air.
Hi Larry!
73's
Greg
WA7LYO
Kinston NC----- Original Message ----- 
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: <telegrapher at q.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Monday, July 18, 2011 10:32 AM
Subject: Re: [Boatanchors] Mic's


do you have an audio sig. gen. you can feed into the mic jack and see
if the V2 puts out a modulated sine wave?

rob
k5uj

On Sun, Jul 17, 2011 at 10:56 PM,  <telegrapher at q.com> wrote:

> Tonight i figured i'd hook up the same old D-104 to it that i used before. 
> Hmmmm, how come no modulation even with the mic gain all the way up. So 
> happens i've got 3 of these D-104's so i took the heads off of all three 
> and hooked them up to the mic connector with a "kluge". We all know what 
> that is right? One of the heads i could get some modulation indication but 
> not what it should be. The other two, nada. Now i thought that was a bit 
> of an odd coincidence. verified wiring from the G stand cthru the cable 
> clear into pin one of the 6au6. Everything checks ok. Just no audio.
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