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Author Topic: New Line of Transmitters from Stretchyman.  (Read 3129 times)

Offline Stretchyman

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New Line of Transmitters from Stretchyman.
« on: March 05, 2019, 1644 UTC »
I’m just about to start a new build of 50 Transmitters and have decided to do 3 variants.

1; 12W, Fixed frequency but changeable by swapping out CPP oscillator, Hammond 1590BBSBK case (small), Direct PWM modulator. 200KHz B/W below 3MHz and 500KHz B/W upto 8MHz. 24V. $200. Audio response 20Hz - 10KHz. Ideal for 12V (3W carrier) and using leaky feeder antenna for broadcasting around the home.
2; 20W, Fixed frequency but changeable by swapping out CPP oscillator, Hammond 1590XBK case, PWM modulator and Modulation tran (custom), 200KHz B/W below 3MHz and 500KHz B/W upto 8MHz. 14V. $250. Audio response 100Hz - 7KHz.
3; 50W, Programmable frequency (programmer supplied), Hammond 1590XBK case, PWM modulator and Modulation tran (custom), integral fan, 200KHz B/W below 3MHz and 500KHz B/W upto 8MHz. 28V. $300. Audio response 300Hz - 7KHz.

ALL designs are single band (200m would be 1.4-1.6MHz or 1.6-1.8MHz, 43m would be 6.5-7.0 MHz, 48m would be 6.0-6.5MHz etc) Class D/E and VERY efficient, so ideal for battery/field operation.

Power level quoted is very conservative CARRIER power and peak power is 4 times this.

The CPP oscillators are dirt cheap (<$5). I’m happy to supply one particular frequency on most bands but if I can’t supply exactly what you need, you will have to purchase it yourself from DigiKey. I’ll supply 6925KHz ONLY for 43m. If this is a problem, please let me know! I can also provide a ‘Selection’ on request. I know there’s folk out there who are ‘Concerned’ that buying an oscillator on an ‘Illegal’ frequency will ring alarm bells and the feds will come a knockin’, please believe me they wont!
ALL transmitters have a rock steady carrier and have now decided to use CREE SiC devices for their ruggedness. The cases are straight from the manufacturer with all work done to ensure consistent quality.
All the Mod trannies are manufactured by a transformer manufacturer and are dipped in varnish.
Postage is ($30) tracked and signed for ANYWHERE in the world, I have never lost a unit in transit!
Paypal direct via friends and family to avoid fees. RFTEKdotLTDatVIRGINMEDIAdotCOM.
If you’re not sure and we haven’t done business before then using regular Paypal will incur an extra 10%. Will eventually put them up on eBay with a 20% surcharge.

ANY questions? Please ask.

Regards

Stretchy.
« Last Edit: May 08, 2019, 0634 UTC by Stretchyman »
'It's better to give than receive' so why RX when you can TX!

         15W and100W models available.

                   Buy one from me, NOW!


                                              ;)

Offline thevni

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Re: New Line of Transmitters from Stretchyman.
« Reply #1 on: February 08, 2021, 2354 UTC »
Hello

I am interested in buying a class e transmitter

years ago i build my own tube transmitters  , and am looking to get back into it

appreciate any info

Thank You

Offline Stretchyman

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Re: New Line of Transmitters from Stretchyman.
« Reply #2 on: February 09, 2021, 0807 UTC »
I'm no longer allowed to advertise on here  :'(
so best to PM or email me at;

stretchyman2k@googlemail.com

For further info.

Cheers

Stretchy.
'It's better to give than receive' so why RX when you can TX!

         15W and100W models available.

                   Buy one from me, NOW!


                                              ;)

Offline Sealord

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Re: New Line of Transmitters from Stretchyman.
« Reply #3 on: February 11, 2021, 1439 UTC »
I see from the advertisement in your signature you still have two models to choose from - do you still offer the FER-TX version?
North East Florida
Indoors: RX-340/4 Square
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Offline Stretchyman

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Re: New Line of Transmitters from Stretchyman.
« Reply #4 on: February 11, 2021, 1547 UTC »
Best to PM or email..
'It's better to give than receive' so why RX when you can TX!

         15W and100W models available.

                   Buy one from me, NOW!


                                              ;)

Online TRI International

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Re: New Line of Transmitters from Stretchyman.
« Reply #5 on: February 19, 2021, 0025 UTC »
I emailed  you looking for I said 50w but 100 would be nice. also send me the price for it as well and tnks ;D
I Collect QSL Cards to patch the holes in my wall :D.
Use Shazam app. to ID all songs.
QSL to trlinternational@protonmail.com

Offline boston_strangler

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Re: New Line of Transmitters from Stretchyman.
« Reply #6 on: May 22, 2021, 2211 UTC »
any word on the 50s?
(3) 3-500z's for that clean broadcast sound
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Offline Stretchyman

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Re: New Line of Transmitters from Stretchyman.
« Reply #7 on: May 23, 2021, 1727 UTC »
Only sell 15 & 100 + not 'allowed' to advertise on here so best pm / email me.

Str.
'It's better to give than receive' so why RX when you can TX!

         15W and100W models available.

                   Buy one from me, NOW!


                                              ;)