[MRCA] T-17

[Jason WA6BBQ]

This is great!! Just what I was doing some searches for with no luck. May I
have the schematic?

Thanks and 73,
Jason WA6BBQ

On Fri, May 1, 2026 at 05:49 Mark K3MSB <mark.k3msb at gmail.com> wrote:

> Here's a picture of Jim's board in my T-17.
>
> [image: image.png]
>
> [image: image.png]
>
> 73 Mark K3MSB
>
>
> On Thu, Apr 30, 2026 at 10:49 PM ac2eu--- via MRCA <mrca at mailman.qth.net>
> wrote:
>
>> Yes, you wouldn't know it had any mod at all , except that it would
>> produce strong clean modulation.
>>
>> I used to have a 1 inch square pcb that fit into most T-17 designs, but I
>> sold out of them..
>> I've modified and simplified the design since then, so I'd have to
>> re-design the pcb. anyway.
>> It's not a big demand item, so I make them on a proto board as needed for
>> restorations.
>>
>> On Thursday, April 30, 2026 at 10:12:44 PM EDT, Jason WA6BBQ <
>> w6iee.73 at gmail.com> wrote:
>>
>>
>> Of the finished product? It’ll just look like a normal T-17!
>>
>> On Thu, Apr 30, 2026 at 19:07 B. Smith via MRCA <mrca at mailman.qth.net>
>> wrote:
>>
>>
>> Perhaps you could take a photo and copy the diagrams- I could post it to
>> my web page with due credit of course.
>> 73 k4che
>>
>> http://k4che.com/T-17/T-17.htm
>>
>>
>>
>> On 4/29/2026 8:46 PM, ac2eu at yahoo.com wrote:
>>
>> There also more "electronic" mods using an electret microphone.
>> I made a stable two transistor self biasing carbon mic replacement and
>> also a less stable but very  simple single transistor type.
>> They both will produce clearer modulation than a NEW T-17 ever did .
>> Carbon has very poor frequency response and they justt get worse over time.
>>
>> On Wednesday, April 29, 2026 at 08:06:21 PM EDT, B. Smith via MRCA
>> <mrca at mailman.qth.net> <mrca at mailman.qth.net> wrote:
>>
>>
>> The Air Show and Military Rally season has started. Perhaps it is time to
>> consider an overhaul or repair of your T-17. There are several mods for
>> more consistent output unless you enjoy banging the T-17 on the side of the
>> table. That black taped telephone button repair is kind of tacky.
>> Z
>>
>> http://k4che.com/T-17/T-17.htm
>>
>>
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