6P1 tube transmitter 5W tube shortwave transmitter on AliExpress for $32.87

[ChrisSmolinski]

Might be nice for the 160, 80 or 40 meter band.

"Some assembly required".  It has "Yak scattered power" - how can you go wrong?

https://www.aliexpress.com/item/4000429415572.html


This kit comes in accordance with the following modifications ( remove air double circuit optimized , providing a suite of circuit prevail ) ,Suite of high -quality, high stability and high withstand voltage mica capacitors, Shortwave transmitter can be achieved :
 
Original:
L1 choice of 22mm wire on the MX-2000 toroid winding 100 turns. L2 determine the frequency of the radio emission . If the wave frequency is selected in the segment , L2 can be used on a 35mm wave magnet wire 30 +50 turn , the choice of 13mm or 25mm paper tube on the wire tightly wound 90 turns. Such emission frequency will fall between 550-1650kHz. If I choose when shortwave band , L2 is available in 0.5mm enameled wire between the 16mm tubes are around 9 turns. This constitutes the oscillator frequency falls between 6 ~ 18MHz. C5 air double its capacity 360pFx2. B1 is the original machine power transformer. High-pressure part of the rectifier switch 4 IN4007. B2 is the original output transformer. C2, C3, that the machine was split mica capacitor , wherein the C2, C3 pressure is preferably greater than 400V . R1, R2 can also purchase their own cement resistors. Yak scattered power due to the larger , its power -election ≥ IW. TX 1/4 antenna , used for some thick wire instead of ' emission wavelength length of about 1/ 4 . I selected is 3mm, 8m long wire . Without the use of the copper-clad circuit is mounted directly with a plastic board on which a diamond. Holes , scaffolding welding can be. As long as the good components , installed after the start-up circuit that will be able to see the flow of electrons within the G light blue when the start-up , accompanied by "hissing " sound. If the conditions do a simple field strength meter , so that by adjusting R2 launch strong maximized. Vertical antenna may be installed through the insulator wall. After connecting the antenna input at B2 at around 5W audio signal from a radio transmitter to pull away , the radio should be able to receive a clear signal distortion should not be obvious. If the launch is too hum , ground can be solved . After measurement , the transmitted power has 4.5W.
 
Customer feedback and work : the firstDoing the wave tube transmitters, produced, medium wave band in the band , I feel quite good fun , should be noted that the negative must be grounded, can greatly reduce the noise and harmonics.

[ThaDood]

Neat!!!! Kind of a modification of the Bob Heil's AM Pine Board Project that he was pushing a couple of years ago. So, 5W on the low bands can be had in the Winter on AM. I've done several QSO's with 5W / 6W 75M AM stations. So, can indeed be done.     https://heilhamradio.com/amateur-radio-post/the-pine-board-project/

[JimIO]

"Some assembly required"

Does it come with instructions?
Is there a schematic or BOM somewhere?

~

[syfr]

I may have to scatter some Yak on this one.

A schematic might be helpful if anyone finds one.

Note: This version does NOT include the air variable. Others do.

[syfr]

Logistics: AliExpress Standard Shipping

There's no schedule at so I don't know how I interlocking miet put!!!!! 01 Oct 2020 07:46
Helpful? Yes (0) No (0)

Additional Feedback

There's no schema, jammer

Seller’s Reply
    after the buyer receive the item ,The scematic will email send . the seller did reply you and send to you , such unbeliveble !!!

[syfr]

"Gallbladder radio frequency modulation kits, FM two lamp, super regeneration electron tube, 6J1+6J1 drive horn"

[ChrisSmolinski]

They have some regen receiver kits as well, 2 and 3 tube: https://www.aliexpress.com/item/4000276132748.html

AliExpress -> text to speech -> shortwave transmitter (with yak scattered power) could be amusing.

[QRP]

DIY

http://nmwilliam.tripod.com/el84.html