Jesse,
You can put a toggle switch on the B+ line going to the Audio PA, this
will cut several hundred mA of current draw from the Class AB audio
section, and allow it to be connected/turned on when service is required.
Since you are working on a VHF unit, you can review the mods on this
site where I took a 110 watt PA, hack-sawed it in half, and made a 5 to
12 watt PA that is very power efficient:
http://www.kuggie.com/ahra/hmftinfo.html
I've also been successful in doing the same with only one transistor
(the controlled stage) and created a .5 to 2 watt PA.
The exciter shouldn't be drawing current when not transmitting, because
most of it is switched power, and the rest is Class C.
Hope this helps...
Kevin Custer
Jesse Lloyd wrote:
I've been looking through the manuals, and from what I can see is that
if use discriminator audio, I should be able to remove (or manually
switch when servicing) a lot of audio amp circuitry. Also I was going
to use a 9.6V reg and run the whole thing from a +13.8 V battery supply.
The exciter circuit, what's every ones thoughts of turning the whole
thing off except when the squelch breaks, then leave it for say 1 min
after the squelch closes. Or is that part totally unnecessary and
turning it on and off via squelch is ok?
With these mods I should be able to get a standby current of 150mA or so.
Jesse
On 8/21/07, *Jesse Lloyd* <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
wrote:
Hey all,
Has anyone here ever heard of, or has done, a low current mod on a
VHF micor repeater so it can be used on a solar site? I plan to
use an external Linkcom RLC1 controller, so I should be able to
remove quite a few power hungry stages. The only thing that I
have to figure out is a RF PA for it, I would like it to put out
5-10 watts.
