68797Re: Hardrock 50 driver amp relay question
- Sep 19, 2012The next run of PCB's that we do will have an updated driver PCB which will add unpopulated areas for:
1. T/R relay
2. On board bias regulator and switching
3. 5 element lowpass filters
I'll try to get updated XFMR to show how to wind it 1:3 instead of 1:2 to get 10 watts output.
The schematic for the driver is posted here:
I know that it doesn't directly answer your question but it may shed some light and I'll be hapy to address specific issues.
--- In email@example.com, John Williams <KE5SSH@...> wrote:
> I was working on an amp when I found out about Jim's driver board. I
> have a schematic that is very similar to Jim's design (and very similar
> to the amp in the Mobo). I added a portion of the circuit that feeds 5V
> to the bias side using S12V or /PTT as well as switches a relay for
> RX/TX. I plan to use one of those kitsandparts.com prototype boards to
> wire this and then use molex connectors to connect it to the driver
> board. Attached is my schematic. Since this has not been breadboarded
> yet, it may have errors, so comments are welcome.
> I bought 2 boards, 1 for a standalone 5W amp and one for a driver for my
> second run amp.
> John - ke5ssh
> On 9/19/2012 3:11 AM, Chris Wilson wrote:
> > 19/09/2012 09:04
> > Has anyone written up detailed instructions for adding a transmit /
> > receive relay to the 5 Watt driver stage kit that was recently
> > offered? Mine arrived incredibly quickly here in the UK and I would
> > like to get the rest of the bits together to commence finishing it.
> > Thanks.
> John Williams
> KE5SSH - ham since 2007
> WQKA523 - GMRS for family use on the farm
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