Ramsey Electronics TT1 Instruction Manual - page 11
TT1
• 11
page 11). In most cases the P1 hook-up in the schematic will be
correct but, as we all know some manufacturers just like to be different.
Though unlikely, the manufacturer of your tape recorder may have
reversed the positive and ground outputs on the remote jack. This is not a
problem as the TT1 is made to withstand reverse voltages. Remember
this point when it comes to testing the assembled unit. If your tape
recorder does not activate use a volt meter to measure from remote jack-
sleeve to remote jack-tip on your board. If the positive voltage is not on
the sleeve the leads will need to be reversed.
Tip
Sleeve “Remote” and “Mike” Jack Cables
Whew ! Now that wasn’t so bad now was it? You have just completed the
tape recorder control section of the TT1. Take a moment now to recheck you
work for clean, shiny solder connections. Resolder any connections that are
less than perfect.
We’ll get back to building now, starting at the audio input at J1 and working
through the audio circuitry.
20. Install C1, .01uF disk capacitor [marked .01 or 103 or 10nF]. This
capacitor is not polarized so polarity is not important.
21. Install C2, .01uF disk capacitor [marked .01 or 103 or 10nF] same as
in step 20.
22. Install R7, 47K ohm [yellow-violet-orange].
23. Install R6, 470 ohm [yellow-violet-brown].
24. Install D7, 1N4148 signal diode(remember cathode orientation).
25. Install D6, 1N4148 signal diode(remember cathode orientation).
26.Install P2, 3.5mm tape recorder “MIKE” plug cable (see figure above).
Congratulations! You have now completed assembly of your
Ramsey TT1 “Tattle-tale” telephone recorder printed circuit board.
At this time lets take a short break to clean up the work area, get a bowl
of Rocky Road ice cream, sit back and look over the work you just did.
Check for cold solder joints, solder bridges, missing components or any
other problems. Once you are satisfied with your assembly work, it’s time to
test your new Ramsey TT1 “Tattle-tale” telephone recorder.