Help finding the schematic for my TR Sequencer
MessageDear Gang,I built a TR sequencer out of the radio Amateur's Handbook in 1993 or 1994.I have spent weeks looking for this thing and it seems that I have also misplacedthe information I built it from. I bought the Circuit board from Far Circuits and builttwo of the units so I would have a spare in case the lightning Fairy decided tovisit one of them.Well, Now I can't find the circuit information. It isn't the digital TR switch that Farhas listed it is the other one. The information says it is from ARRL HandbookChapter 31 figure but it doesn't list the year. I think it is from a 1993 or 1994Radio Amateur's handbook.I had to have built it in 1993 or 1994 because that was the years I expanded mymountain topping station to 5 bands and I had to have the sequencer to do that.If anyone has a 1993 or 1994 Radio Amateur's Handbook could look in Chapter31 at figure 22 and if it is a sequencer... My sequencer was designed by ChipAngle it has a 4070 IC and a LM339 IC in the middle of the board. It has fouroutput transistors on one end. and 2 2N2222 transistors on the other end.I need the schematic and information for that one. I made the BIG MISTAKE ofgiving all my old handbooks to other hams and now I need them. It seems Inever learn.Any help would be greatly appreciated. This sequencer is going to be used inmy upgrade to Mast mounted preamps in the near future.73 Dave
David R. Hassall WA5DJJ
- David R. Hassall wrote:
> Well, Now I can't find the circuit information. It isn't the digital TRI have Handbooks from 1935, 1942, 69, 71, 72, 78, and 2005-2008.
> switch that Far
> has listed it is the other one. The information says it is from ARRL
> Chapter 31 figure but it doesn't list the year. I think it is from a 1993 or
> Radio Amateur's handbook.
The 2005 Handbook has, in section 19, page 48, a "TR TIME DELAY
GENERATOR FOR VHF/UHF SYSTEMS".
I THINK this is the one you've described -- it speaks of FAR
Circuits and the schematic shows chips and transistors just as you've
KD5XB -- Earl Needham
Clovis, New Mexico DM84jk
Quoting from the Coast Guard: ZUT