Re: getting the AC mains out of the TR7
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Just a thought for a simple option but not that smart.
I have a few tube KW Electronics transceivers (in addition to Drakes).? Two were bought with an on off switch on the power supply unit, being home mods.
But the TR7 fan is an issue since I assume it would be AC only.?
Nigel
On 2025-04-01 13:15, n4buq wrote:
> Perhaps a switch that responds to commands spoken in Morse code.
*** I've used code for I/O on a few projects.? Well, mostly for O.
Once upon a time, I was working on a project at work that had a CPU that
talked to
another CPU.? They communicated via a shared memory interface.? The CPU
I was working on had no I/O, except for a single reset line to the main
CPU -
so it could act as a watchdog.? I got the program working fine on the
ICE ( In Circuit
Emulator ).? But when I plugged in a real CPU, it sat like a lump and
did nothing.
I beat my head against the wall with that thing for about a week, then
had an idea...
I brought in a small speaker and a resistor.? Hooked them to that one
I/O line, and
wrote a quickie morse code driver.? "If you get here, send an "A", if
you get there, send a "B"....etc.
Had it figured out in about 15 minutes.
Another one:? ?I was doing these back exercises, each movement to be
held for 5 seconds.? Sure would
be nice to have a box with a button that would beep after 5 seconds...
Then I thought - why not have it
count my repetitions?? And so it does....in Morse code.
A third one:? Somebody posted an adventure game on Hackaday with Morse
code input & output.? It worked
with a blinking light.? I modified it so it would beep instead.? Much
more ham-friendly.? I'm going to
put it in a nice little box and take it to the local radio club meeting.
? ? ? ? ? ? ? ? ?- Jerry, KF6VB
>
> Barry - N4BUQ
>
>> On 2025-03-31 21:06, Jim Shorney via wrote:
>>
>>>
>>>
>>
>> *** Or you could get a "clapper" :).
>>
>>
>>
>>? ? ? ? ? ? ? ? - Jerry, KF6VB
>>
>>>
>>> Supposedly capable of switching 15A and it sounds like they can
>>> handle
>>> moderately inductive loads. Problem solved. Although I did have to
>>> think about what to use the other two in the three-pack for. There
>>> was
>>> nothing in the shack that I "need" to turn on and off wirelessly but
>>> I
>>> found something to use the second one for. They have been working
>>> well
>>> for several months. We'll see if they survive our thunderstorm
>>> season.
>>> Ironically, I did put the third one in the shack last week so I could
>>> remotely reboot my LAN connected SDR receiver when it drops off the
>>> network. I suppose you could use one to turn the PS7 and a FA7 on the
>>> rig on at the same time, saving having to rig up a DC fan. It would
>>> take just a short extension cord from the FA7 to the 2nd receptacle
>>> on
>>> the box.
>>>
>>> 73
>>>
>>> -Jim
>>> NU0C
>>>
>>> On Mon, 31 Mar 2025 20:21:31 -0700
>>> "Glenn Hetchler WB0DKT via " <ghetch=[email protected]>
>>> wrote:
>>>
>>>> I never liked the fact that there was the AC for the PS7 routed
>>>> through the TR7. I have used a good power strip for years and tried
>>>> to
>>>> not switch the volume control to OFF since I read about them being
>>>> unobtainable, and failing both electrically and mechanically.
>>>>
>>>> Working on a project TR7 and PS7 with a younger ham, I decided that
>>>> I
>>>> should finally figure out how to keep the AC out of his and my TR7s.
>>>> As we were checking out the PS7 I looked at the circuit board that
>>>> has
>>>> the voltage switching and all that (mounted by the switches being
>>>> pop-riveted in place, seriously???) and decided there had to be a
>>>> better way that to mess with that wiring.
>>>>
>>>> And then an idea came to me that should have 40+ yrs ago when I got
>>>> the rig. Surplus Sales has the Jones connectors (for a cable, but we
>>>> did not connect any cable) that are the same configuration as on the
>>>> back of the rig. Part Number: (CNE) P310CCT
>>>>
>>>>
>>>> With it we just jumpered pins 1-2 and 3-4 inside the connector
>>>> (check
>>>> your PS7 and TR7 manuals to see) and then plugged it on to the cable
>>>> from the PS7 and it works just like the PS7 was plugged into a
>>>> turned-on radio. If you need ALC or VOX, you'll need to get another
>>>> connector to plug-in to the back of the TR7, but we have not needed
>>>> either yet.
>>>>
>>>> Then we leave the PS7 cable that has the AC and wires for the ALC
>>>> and
>>>> VOX coiled up behind the PS7 and turn things on with the power
>>>> strip.
>>>> Now only the 12V cable is plugged into the TR7. Of course the fan
>>>> will
>>>> need to be changed to 12 VDC on the radio. That will be our next
>>>> upgrade.
>>>>
>>>> Before recommending the Jones connector from Surplus Sales to the
>>>> group, I called them to make sure there were more available. They
>>>> checked stock and said that they should have at least several
>>>> hundred.
>>>>
>>>> Thought I'd share this idea with the group. I am sure others may
>>>> have
>>>> done something similar, but it is nice to know where we can still
>>>> get
>>>> Jones connectors at a reasonable price.
>>>>
>>>> 73,
>>>> -Glenn/ WB0DKT
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> 73
>>>
>>> -Jim
>>> NU0C
>>>
>>>
>>>
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