Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- Gerry -
It's in HR for August 1972. Really straightforward design for the time, using 7400 MSI chips and the 4044 Phase Detector. Three diode encoded rotary switches. 13 page article typical of Ham Radio Magazine in it's heyday.
Seems it had a problem with 10 kHz spurs, also typical for the times! :-)
73, Garey - K4OAH Atlanta
Drake C-Line Service Manual <http://hr99.home.mindspring.com/R-4C_Servicez/>
Gerry wrote:
Which article was that? I have QST, CQ, and HR. I'd like to look it up if nothing else, just for curiosity. Seems like it would be easy to duplicate with today's technology. I made decals once for my SPR-4 using Visio software and ink jet printer.
73, Gerry
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Garey Barrell Sent: Sunday, March 13, 2005 10:03 AM To: Drakelist Subject: Re: [drakelist] FS-4
Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- Ron -
I have that overlay. It was printed in the article in August 1972.
Be glad to send it as an attachment to anyone who wants to see it.
73, Garey - K4OAH Atlanta
Drake C-Line Service Manual <http://hr99.home.mindspring.com/R-4C_Servicez/>
Ron Wagner wrote:
Ron Wagner <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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There is also an overlay in an old HR magazine. That article had a FS4 clone designed and build using PLL technology of the time. That overlay will work well and if anyone really needs it I can get a scan (I think). I spoke with the author of this device some years ago, but the varac-diode is no longer made. That and the new DDS technology produces some really good RF output. I have had a DDS FS4 clone on my bench for some time, just never got around to finishing it (minor intermittent problem with noise on the PIC to DDS interface). My TR7 has turned into my main rig, and the twins have been somewhat "on the bench". Some day I will get the urge again. BTW I had no intentions of ever marketing it, but figured my cost for my personal project would have been about $100, complete.
73,
Ron
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