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OK, I fixed it. It was transformer T6. One of the leads was not connecting to its circuit board land. Now receive is much improved, and it actually transmits! I am seeing two watts output on 40M. But not with HDSDR :(.

I have only gotten transmit working with "rocky", which is primitive. HDSDR does hit the PTT on the softrock, but does not
seem to actually supply it with any baseband audio.

Can HDSDR be made to transmit? If not, what's the hot ticket for SDR software to use with the softrock?

On 27/08/2021 19:46, jerry@... wrote:

Can HDSDR be made to transmit?

Yes.
Although CW may require modification.

73 Alan G4ZFQ

On Fri, Aug 27, 2021 at 07:46 PM, jerry@... wrote:

If not, what's the hot ticket for SDR software to use with the softrock?

I use this...

I just had yet another project fail because of a bad connection to a toroid - where the insulation didn't burn off properly. I've had it. I bought one of those motorized strippers for enameled wire. It just came in. It's a Chinese copy of an expensive German tool. Works great for anything thicker than say 26AWG. With really thin wire, you have to be careful, because it can just chop the wire off. Which could be a disaster if you have the exact length of wire you need - coming out of a laboriously wound toroid.

For really thin wires, Knipex makes a manual pinching stripper that looks pretty good. I was on the fence... might still get one of those.

So - the only software I've found that reasonably transmits with the Softrock is "rocky". It's not fancy, but it fully supports
transmit, including a keyer that works with a paddle plugged into the softrock.

HOWEVER - I am not able to calibrate the frequency of the Si570. Let's assume that my generator ( actually, a tinySA ) is set to 6.88MHz. The softrock sees its strong signal at 7.013MHz. I click on tools->si570 calibration. A little box appears with a couple of text boxes: "Displayed Frequency"( can't edit it, it's just wherever the frequency cursor is pointing ) and also "True Frequency". I dutifully enter the frequency that my generator is actually putting out, hit "OK", and....nothing. No difference.

Maybe if I edit the "si570Calibration" field in Rocky.ini? Right now, it's "Si570Calibration=0.205920063688709".

- Jerry KF6VB

...and this is weird. Just for yuks, I commented out the si570Calibration line in Rocky.ini, by putting a # at the beginning. Restarted Rocky, and it's dead nuts on. Well, about 20Hz off. That's good enough for me!

Wow - Rocky even does semi-break. It's called "Vox", but you hit the key in CW mode and it transmits.

Trying some CQ's on 40M...no answers. 2 watts just isn't much. I wonder if I dare use this thing with my Tiny Linear?
The Tiny Linear is a home project - a somewhat modified Chinese linear kit with a touch screen and an LPF from a
defunct ICOM rig. Packaged in a truly tiny box. It does 150W with 5W drive. So the Softrock might reasonably drive it to 60W.

I will have to stick it on a spectrum analyzer and verify that any spurious outputs are not too bad. It's easy to be lax and yet not bother anybody with 2 watts. 60W is a whole other story.