Actually, we made 3 units: 7Mhz, 21Mhz, and 50Mhz. I made a board. For the coils, I disassembled a used color TV, took out the coils, and reinstalled them. Once you can make one, you can easily make many.
I created a coil by winding the small intermediate high-frequency transformer appropriately, wrapping it around a small capacitor, and adjusting it with a dip meter. Make it with a slightly higher frequency. In terms of frequency, if it is a few megahertz above
The stray capacitance will be just right. After that, I adjusted it with the core. After that, I discovered that TOKO had a coil in Akihabara, so I used TOKO, but the best one was the one I removed from the TV. Easily increase several megabytes by adjusting the core
can be moved. These small transformers can produce a high frequency output of about 1W. Beyond that, I bought a lot of Amidon cores at Toyomura. At that time, a textbook on how to use the toroidal core was being sold.
Of course I bought it. I was able to output up to 5W with Amidon's core, but I felt it was impossible to output more than that. I was plagued by abnormal transmissions and ended up using 5W 7Mhz AM. Frequencies higher than that were about 2W.
PEP Power A2 outputs 10W. The power meter only touched about 5W with audio, but this was enough. CW was also available, so we were able to communicate on five continents. I was satisfied with 7Mhz on the phone.
I was told that the other party's station was out of F, but I didn't realize that this was unavoidable because the other party had a homemade machine and was using a VFO.
The radio wave format was SSB A3J and only LSB. I think the frequency was pretty stable. If you understand circuit diagrams, you can look at the circuit and understand that this is a transceiver made with the minimum amount of equipment and attention to detail.
I had a lot of trouble with the S-meter for reception.The sensitivity was poor, and even when I was using the S9, I couldn't shake it much, and when a local station came on, it stopped shaking, so I ended up adding a few decibels of attenuator. I don't care about reception
I can do it, but I have to move several KHZ frequencies to get the transmission to the other party's frequency, which is also difficult.
If you add too many functions, it will not work as expected. 21Mhz or higher devices were relatively easy to create. I walked everywhere with the built-in battery. I was around 40 years old. It was when I was at Panasonic.
Ham and Audio
Just start again Ham Radio oparator as JH1DAS ,I do not hold this license so necesary to
send form to minstory of radio telecommunication in Japan as Call Sign is JH1DAS.
I hold 1st class Ham Radio license in Japan.ex JH1DAS and ex WB4ACI, WB4ACI/CE3 long time
ago where in Chile.ex member of CE3AA Radio Club of Chile(1981-1985).
on 10th July I got JH1DAS call sign again.
You can see green keyer(Biproprex bug key) is, 37 years ago David(WB4EGE Extra Class) gave me when
I had been in Jacksonville Fla as I was WB4ACI.still bug key is good condition.
thank you David.
Gear: FT-450D and ATAS-120A (Screw Driver Antenna 15m high of window)
Vibroplex Bug Key and Bencher manupilator.
WEBSDR very famous for watch by PC for Ham、even your Smartphone has JAVA can works and many country made up these kind of Site.
WEBSDR ORG <-----please access WEBSDR site.or
Android has APP for WebSDR as pRxTx you can use by celler directly .please try to install it's.
If there is no sound, click the Firefox sound ON switch at the top right of the screen. There will always be sound.
WEB SDR Site
Just show picture watching Ham Radio by Any PC
very much util site for knows about ham and can watch any where in your country .if your ham station is strong like KW ,you can hear from PC
because this is real time .even if do you have Smartphone like Android you can use by GLSDR can watch Ham Radio .
By GLSDR Sony Old Xperia
center>
pRxTx Android using watch ham radio /pRxTx is quite good
any way you can do watch SDR server by Android celler as pRxTx application.
These Site are real RX for Ham Band world wide ,just try !!!!to watch and please see Japanese versionmore
informations. '73 de JH1 DAS from Yachiyo Chiba Japan
This Site is a part of Single Ended Amplifier D.I.Y
How to build up SSB Bander for 15m/40m
