.5 Watt to 5 Watt driver board Rev C
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Author:  N9MS [ Sun Aug 26, 2018 11:56 pm ]
Post subject:  .5 Watt to 5 Watt driver board Rev C

I'm using the Hardrock with two different transceivers. One of them (Hermes SDR) only puts out .5 Watts. The other one 5 - 10 Watts.

Instead of building the driver board into the Hardrock, I'll put the driver board inside the Hermes enclosure.

There are 3 power wires (Red, Yellow, Black)

If Red is 12v and Black is Ground, what is the Yellow Wire? What do I connect the Yellow wire to inside my Hermes?


Author:  jimveatch [ Mon Aug 27, 2018 5:21 am ]
Post subject:  Re: .5 Watt to 5 Watt driver board Rev C

Hi Mike,

The connections on the Rev C driver are:

Black - Ground
Yellow - +13.8V DC @ 2A max. (constant)
Red - 0V during receive, +5V during TX @ 10 mA (to turn on the bias)

As for where to connect this in the Hermes, I'll have to defer to other Hermes users. Depending on type of signalling the Hermes uses you may need additional circuitry to provide a 5V bias source.


Author:  N9MS [ Tue Aug 28, 2018 11:23 pm ]
Post subject:  Re: .5 Watt to 5 Watt driver board Rev C

It looks like I can get 5V off of J26. I already have a couple of relays inside the Hermes and one has an extra contact I'm not using.

I should be OK. Thanks!

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