Has anyone constructed an AM transmitter? I've had a lot of enquirers about building and supplying but there are very few on the net. Locally there is a kit available but it's not a viable commercial kit as there are lots of items one has to build and wind. All I want is a kit of parts to put together and sell.
Rudy

:Has anyone constructed an AM transmitter? I've had a lot of enquirers about building and supplying but there are very few on the net. Locally there is a kit available but it's not a viable commercial kit as there are lots of items one has to build and wind. All I want is a kit of parts to put together and sell.
:Rudy .

Rudy:
This question comes up fairly often on this forum. There are kits you can buy, but I would recommend betting the schematic of a wireless phonograph that were popular years ago, and copying that. Then tie the two stereo channels of one of the many sources of of music available, and play it through a restored radio.
There will be many suggestions coming your way, I am sure, but I like the idea of building something like the mixer stage of an AM radio, only having the local oscillator serve as the carrier, and putting audio where the RF usually enters, thus modulating the carrier. The oscillator coil can be replaced with an antenna coil, the tube is doing what it is designed to do. Most radio stations used plate modulation, where the audio was fed into the B+ going to the plate of the output tube, but trying that with a single tube will probably give as much FM as AM.
There is a famous one around that uses a 117 Volt filament tube, called something like the "L'il 7" that can be found on the internet.
Lewis

::Has anyone constructed an AM transmitter? I've had a lot of enquirers about building and supplying but there are very few on the net. Locally there is a kit available but it's not a viable commercial kit as there are lots of items one has to build and wind. All I want is a kit of parts to put together and sell.
::Rudy .
:
:
:Rudy:
:This question comes up fairly often on this forum. There are kits you can buy, but I would recommend betting the schematic of a wireless phonograph that were popular years ago, and copying that. Then tie the two stereo channels of one of the many sources of of music available, and play it through a restored radio.
:There will be many suggestions coming your way, I am sure, but I like the idea of building something like the mixer stage of an AM radio, only having the local oscillator serve as the carrier, and putting audio where the RF usually enters, thus modulating the carrier. The oscillator coil can be replaced with an antenna coil, the tube is doing what it is designed to do. Most radio stations used plate modulation, where the audio was fed into the B+ going to the plate of the output tube, but trying that with a single tube will probably give as much FM as AM.
:There is a famous one around that uses a 117 Volt filament tube, called something like the "L'il 7" that can be found on the internet.
:Lewis
:
Rudy:
I have two different AM xmtr's. One is a kit from "Antique Electronic Supply" (tubesandmore.com)
It is a one tube Xmtr, easy to build and works very well.
The other is a very good solid state "SStran AMT 3000. I had them build it,although it does come in kit form. It has volume, modulation, and compression controls on it. It is a very high quality 100mw xmtr.
I use it from mu computer to my old radios all the time. Just google SStran AMT 3000
Chuck

I also highly recommend the SStran3000. I've sent you some information.

Dennis

:I also highly recommend the SStran3000. I've sent you some information.
:
:Dennis
:
Hi, I too have a SStran3000 and love it. I built my'n it was and interesting and enlightening build and not difficult at all. I've used it everyday for the last 3+ years, very dependable. You can also set it up to broadcast up to 2 miles just not sure that is legal or not. Best 2 U, George T

::I also highly recommend the SStran3000. I've sent you some information.
::
::Dennis
::
:Hi, I too have a SStran3000 and love it. I built my'n it was and interesting and enlightening build and not difficult at all. I've used it everyday for the last 3+ years, very dependable. You can also set it up to broadcast up to 2 miles just not sure that is legal or not. Best 2 U, George T

Thanks for all your replies, I will certainly consider the SSTRAN 3000
Regards

Rudy
:

Rudy

You can build a simple 1 tube transmitter, stable and high quality signal. Read here:

http://www.antiqueradios.com/forums/viewtopic.php?f=12&t=68236&hilit=6888

Norm

:::I also highly recommend the SStran3000. I've sent you some information.
:::
:::Dennis
:::
::Hi, I too have a SStran3000 and love it. I built my'n it was and interesting and enlightening build and not difficult at all. I've used it everyday for the last 3+ years, very dependable. You can also set it up to broadcast up to 2 miles just not sure that is legal or not. Best 2 U, George T
:
:Thanks for all your replies, I will certainly consider the SSTRAN 3000
:Regards
:
:Rudy
::
:
:

:Rudy
:
:You can build a simple 1 tube transmitter, stable and high quality signal. Read here:
:
:http://www.antiqueradios.com/forums/viewtopic.php?f=12&t=68236&hilit=6888
:
:Norm
:
: :::I also highly recommend the SStran3000. I've sent you some information.
::::
::::Dennis
::::
:::Hi, I too have a SStran3000 and love it. I built my'n it was and interesting and enlightening build and not difficult at all. I've used it everyday for the last 3+ years, very dependable. You can also set it up to broadcast up to 2 miles just not sure that is legal or not. Best 2 U, George T
::
::Thanks for all your replies, I will certainly consider the SSTRAN 3000
::Regards
::
::Rudy
:::
::
::
:Thanks Norm,
I read a lot of it tonight, sounds interesting.
Rudy
: