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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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16th Jan 2015, 11:40 pm | #1 |
Retired Dormant Member
Join Date: Dec 2013
Location: Plymouth, Devon, UK.
Posts: 3
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PW or WW Top band Tx
PW or WW Top band Tx
I am trying to find an article from the early 70's published in practical wireless or wireless world? It seem to remember it used an AUY10 osc & 2N1907 pa both TO3 pnp germanium, I seem to remember that the mag cover showed the dash of a car with it fitted? if anyone can remember when & where it was published please let me know. I built one at the time and it worked a treat the main problem at the time was the 2N1907 i have just found a couple of them and would like to build another. |
17th Jan 2015, 10:20 am | #2 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,194
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Re: PW or WW Top band Tx
Hi there was an earlier PW top band TX in the late 50's. This was valved and a cover feature so that may lead to some confusion if you are looking for a transistorised version.
I believe there are some sites with PW and WW indexes on the web (by people who sell the mags), these may helpful if you can locate them. Ed |
13th Mar 2015, 8:39 pm | #3 |
Retired Dormant Member
Join Date: Mar 2015
Location: Bracknell, Berkshire, UK.
Posts: 1
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Re: PW or WW Top band Tx
I too built this top band Tx as a project when I was at college in about 1970. Recently I found the Tx in the attic and, having replaced the AUY10 oscillator transistor, managed to get it working again. I have managed to draw up a circuit diagram but I would also be delighted if only I could find the original article on its construction which I believe appeared in Practical Wireless in the late 60's. Can anybody please help? I would add that the transistors can still be obtained in the internet (especially from the U.S.), but I have discovered that some 2N1907s seem to have deteriorated and failed after a long shelf life. I believe the 2N1908 can be used as a substitute.
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