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THE AM BULLETIN BOARD => Technical Forum => Topic started by: KF9CM on July 25, 2007, 02:10:25 PM



Title: Spectronics DD-1 Schematic
Post by: KF9CM on July 25, 2007, 02:10:25 PM
I've already Googled this and no luck, except for the operators manual. Does anyone have a schematic for a Spectronics DD-1 series frequency Display? I'll take a DD-1, DD-1C or DD-1T


TNX Gary, KF9CM


Title: Re: Spectronics DD-1 Schematic
Post by: Pete, WA2CWA on July 25, 2007, 03:16:46 PM
I have three different DD-1 type manuals and none came with the schematic. They never issued any service related document. QST had a review of the DD-1 in 1974. However, I'll willing to bet you can take a typical early to mid 70's designed frequency counter and you would probably have most of the same circuitry. The main differences would be in the interface circuitry to the particular equipment.


Title: Re: Spectronics DD-1 Schematic
Post by: KF9CM on July 26, 2007, 09:25:23 AM
This unit has been modified for some reason and I'll need a schematic to put it back to original.

I love it when CBers get together and want to play electronics.

TNX anyway


Gary, KF9CM
AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands