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15th Aug 2008, 9:00 pm | #1 |
Rest in Peace
Join Date: Feb 2008
Location: Dorset, UK.
Posts: 947
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2 metre transmitter
This is the first 2 metre transmitter I built, between 40 and 45 years ago.
Stored for many years in the attick, I came across it last weekend. It is a conventional tx for the period, and I believe the design came from "the Bull" as Radcom was then known, or the RSGB handbook. Using 8.+ mc/s crystals, multiplied up to 144mc/s, and then into the PA which is, or was, a QQV06-40a. As can be seen, it has suffered some damage during transit. Modulation was via 2x 2B254M's. As the output is AM, and quite wide band at that, I doubt it will get used again, but one member of this forum who saw it found it interesting, so I thought that others may do too. http://img.photobucket.com/albums/v1...ara2/P0053.jpg http://img.photobucket.com/albums/v1...ara2/P0051.jpg http://img.photobucket.com/albums/v1...ara2/P0054.jpg |
15th Aug 2008, 9:04 pm | #2 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
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Re: 2 metre transmitter
Very nice Alan. To my mind Amateur Radio should be all about building your own gear. However these days I have to be content with restoring vintage gear. Valve based of course.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
15th Aug 2008, 10:14 pm | #3 |
Nonode
Join Date: Jun 2005
Location: Western Lake District, Cumbria (CA20) - UK
Posts: 2,136
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Re: 2 metre transmitter
I could not agree more with Graham's comments above.
A good build standard of which you can be proud. This is what it's all about. I have a couple or three projects of similar nature from Radio Constructor in mind to while away the dark evenings of the next few winters. Regards,
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Brian |
16th Aug 2008, 9:12 pm | #4 |
Retired Dormant Member
Join Date: Jul 2008
Location: nottingham
Posts: 11
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Re: 2 metre transmitter
Does it have the smell?
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17th Aug 2008, 10:03 pm | #5 |
Rest in Peace
Join Date: Feb 2008
Location: Dorset, UK.
Posts: 947
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Re: 2 metre transmitter
Thanks for the comments.
I might just find its power supply, a spare PA, and fire it up. Assuming that it works OK, I doubt I would use it much. It was always the building that interested me more than the working. Oh, no smell. |
18th Aug 2008, 1:46 pm | #6 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
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Re: 2 metre transmitter
I've moved some posts relating to AM operation to a new thread here:-
https://www.vintage-radio.net/forum/...ad.php?t=31360
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |