Re: [Drakelist] TR-4 mystery circuit attached to PTO

Ethan, It is certainly some sort of FSK circuit. Actually, it looks like 2 FSK circuits. Why 2? Well, if one is good, two must be better, right? Back in the day, it was common to use both normal shift (850Hz) and narrow shift (170Hz). Normally you just changed it by the control voltage but

Re: [Drakelist] TR-4 mystery circuit attached to PTO

I have not checked the TR4 manual but in the T4 series they show the FSK circuit. I had 2 of them in mine as well. One was set for 850 cps shift while the other was for 170 cps shift. That was at the time when things were still at 850 but moving to 170. I was also in MARS and they were

[Drakelist] looking for Receiver R-4 to R4C

??? Looking for a drake receiver Of the R- series. Will consider any and all ,including bench jobs. R-4 to R-4C. can do pay pal+ or USPS mo.? Please contact me off list. thanks dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net