[BC] 30D transmitter...

[Burt I. Weiner]

The 30D used a pair of 2E26s in the final and a driver 2E26.  The rest of 
the tubes were loctals.  They were very reliable and would run forever.  As 
I mentioned before, I modified mine to run direct FM by using a Varactor 
diode on the crystal.  The response capability was essentially from DC to 
15 KHz keeping the modulation index at no less than 1 at the high end.  The 
modulation was very linear out to about 30 KHz deviation.  For my purpose, 
as a repeater transmitter, I was interested in the clean, flat low end and 
up to 5 KHz.  I drove it with a combination of Audimax and Volumax with a 5 
KHz low pass filter after the Volumax.  The reason for the low end was that 
I was using sub-audible telemetering.

Burt

At 06:00 PM 7/18/2005 -0400, you wrote:
>Subject: Re: [BC] FMTRU-30D...
>To: Broadcast Radio Mailing List <broadcast at radiolists.net>
>Message-ID: <42DBBE75.7770.16AAB81 at localhost>
>Content-Type: text/plain; charset=us-ascii
>
>On 18 Jul 2005 at 11:42, Burt I. Weiner wrote:
>
> > So much so that it is the very same thing.
>
>That is OLD. I remember those days and nights
>when the cops would come around at 3 AM, and
>it wasn't because there was a party going on
>either. <g>  I'd get a call from the dispatcher
>and they'd be there as soon as I pulled some
>clothes on.
>
>The 30D was a not bad unit, especially when
>retrofit with a Motrac mike. I still liked
>my 30 W RCA better though. <g> That thing
>was built like a tank.
>
>Phil Alexander, CSRE, AMD
>Broadcast Engineering Services and Technology
>(a Div. of Advanced Parts Corporation)
>Ph. (317) 335-2065   FAX (317) 335-9037

Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California  U.S.A.
biwa at earthlink.net
K6OQK