AM Reflex Rec
60's reflex receiver
by admin Thu Sep 07, 2017 10:57 am
Hi Graham,
Welcome to the forum, and many thanks for sharing the links with us. I took the liberty of editing your message to add the links into the message body, because guests are not allowed to post links (had a lot of trouble with SPAM a few years ago).
It is interesting that many commercial radios have dies over the decades, but homebrew projects such as this seem to be immortal
I recently found a source of OC171 and AF117 devices and when I have finished building my oscilloscope I had thought about replicating the old Philips EE10 receiver. That used to behave almost as a superhet and performance was excellent after I added feedback.
But you project looks good and still going strong after more than 50 years. Thank you very much for sharing it with us. It is info like this that fires the imagination and the memory.
Very best regards from Harry - EA/SM0VPO
Welcome to the forum, and many thanks for sharing the links with us. I took the liberty of editing your message to add the links into the message body, because guests are not allowed to post links (had a lot of trouble with SPAM a few years ago).
It is interesting that many commercial radios have dies over the decades, but homebrew projects such as this seem to be immortal
I recently found a source of OC171 and AF117 devices and when I have finished building my oscilloscope I had thought about replicating the old Philips EE10 receiver. That used to behave almost as a superhet and performance was excellent after I added feedback.
But you project looks good and still going strong after more than 50 years. Thank you very much for sharing it with us. It is info like this that fires the imagination and the memory.
Very best regards from Harry - EA/SM0VPO
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AM Reflex Rec
by GrahamH Thu Sep 07, 2017 8:10 am
I came across your site today while looking for cct ideas.
I made a reflex set similar to yours when I was in high school in the late 60s. It is in a Kodak slide box and works ok as a pocket radio.
It uses germanium transistors, has a single diode detector rather than a doubler, and has some +ve RF feedback to enhance the sensitivity. The regen is via a few turns on the ferrite and a trim cap. Here is a photo link.
http://www.ipernity.com/doc/grahamh/24043495
http://www.ipernity.com/doc/grahamh/24043513
I made a reflex set similar to yours when I was in high school in the late 60s. It is in a Kodak slide box and works ok as a pocket radio.
It uses germanium transistors, has a single diode detector rather than a doubler, and has some +ve RF feedback to enhance the sensitivity. The regen is via a few turns on the ferrite and a trim cap. Here is a photo link.
http://www.ipernity.com/doc/grahamh/24043495http://www.ipernity.com/doc/grahamh/24043513
Last edited by Admin on Thu Sep 07, 2017 10:47 am; edited 1 time in total (Reason for editing : Links added to text - admin)
GrahamH- Guest
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