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OK scrub that. I ve just found the pot adjustment screws underneath the bottom cover ... ?. -- Mike G8GYW

I'm checking the performance of my newly acquired SM-220 and note that the levels of the two tone generator measured at TP1 and TP2 are 5.8V p-p which is nearly double the specified 3V. So I decided

Thanks Tom. -- Mike G8GYW

I leave my 220 in line all the time, and turn it on for the first few transmissions from each transmitter so I can see what my signal looks like. (I'm one of those idiots who constantly tinkers with

I believe the speech processor is only available for the microphone main connector circuit.

Thanks Sam that link was very informative and it has persuaded me not to go down that route. I don't need the complication of an audio rack! -- Mike G8GYW

I couldn't find an SM-230 locally but I did get an immaculate SM-220. Not the same colour as my radio but it will do for now. Do you guys leave the monitor in the antenna lead all the time or just

I think the main difference between the two input methods is that the mic input has a differential amplifier to cancel common-mode noise (i.e. noise imposed on both the signal and ground wires from

MONTHLY REMINDER--Our Amateur Radio Groups Below are our amateur radio related groups. Some may be new enough there are only a few members. If one of those interests you, join it and give it some

Thanks Trevor. I get the impression that the guys doing this are running external audio processing whereas I would just want to use the mic (at an appropriate level). -- Mike G8GYW

Hi Mike You might like to look at this; https://www.wz5q.net/talkvoodoo/viewtopic.php?t=39 I have to say I’ve not yet tried using the ACC in place of the mic… 73 trevor G4CLE

Now that I've fixed the problem with my ACC2 socket I've been reading about the supposed benefits of using it for audio in instead of the Mic socket. Apart from making the front panel tidier (no mic

Hello Sam I made sure that the indent was correctly aligned, the problem was the excessive amount of force required to push the plug home. I've thrown that cable away now to avoid problems in the

Mike, I don't know that you indicated the radio was mis-behaving when no cable was installed in the socket... As others indicated, the 13-pin DIN male should mate with the female socket EASILY. You

No problem Mike....Glad you got it sorted...73...Jordan...

Hi Jordan, I bought an MFJ accessory cable with a 13 pin DIN plug on one end and it goes into the ACC2 socket easily. It looks identical to the other plug that doesn't fit so I don't know where the

I am located in Japan, and I have SM-230 and would part with it if somebody want it.? Tom

Thanks John. That's a low price, the last one I saw at a UK dealer was ?699. My PS-31 PSU came from the US, it was in immaculate condition but the courier dropped it and bent the rear

Here is one if you can get them to ship it to the UK: https://www.hamradio.com/detail.cfm?pid=M1-002192 73 John AF5CC

The AIP function bypasses the Rx RF amplifier and feeds the Rx signal directly to the mixer, resulting in less gain on Rx...That's why you see less signal on the SM-230 when the AIP is