I have the CTR-111 Optimus Recorder, I noticed the following off that link.
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To control a tape recorder using the radio built-in timer feature and its REC
STANDBY jack, it is necessary, for most recorders, to reverse the polarity of
the patch cable used to connect the radio REC STANDBY jack to the remote mic
(REM) jack of the recorder.

With a patch cord attached to the REC STANDBY jack and measuring the voltage
from the other end of the patch cord, the tip of the submini plug is positive
and the lower segment is negative.

However, to make a cord that works with my cassette recorder, I had to reverse
the polarity, making the tip negative and the lower segment positive.

I bought (and subsequently returned) a GE brand cassette recorder ($20) from
K-Mart just to cross check recorders since all other testing was done with
Radio Shack models. It had the same problem (needed the reversed polarity
cable.)

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I don't know if I understand this correctly or not. Is there a patch chord that
can be purchased (again) from Radio Shack or does one have to be homebrewed.
{?}
If there is, got a cat# handy? :-)

~^Monitoring The Spectrum^~
Hammarlund HQ129X /Heathkit Q Multiplier
Hammarlund HQ140X
Multiple GE P-780's(GREAT BCB Radios)
RCA Victor *Strato- World*
RCA Victor RJC77W-K(Walnut Grain)
1942 Zenith Wave Magnet 6G 601M
Cathedral/ Ross#2311/Rhapsody-MultiBand
DX100/394/*SUPER*398/399/402
OMGS Transistor Eight/Realistic 12-1451
Henry Kloss Model One/Bell+Howell
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Alpha Delta DX Sloper 57ft.
500ft. 12AWG. (non-terminated)
120ft. 12 AWG Long-Wire
2 Radio Shack Loop Antennas
Radio Shack Amplified Antenna
30X30 DiamondLoop(six section 830pf Cap)
* Diamond Loop mounted to Lazy Susan TurnTable*
*21/2X2ft.FiveSpoked~Penta-Loop~PancakeLoop*
~OptimusCTR-111Cassettte Recorder~
~Radio Shack 2Speed VOX#43-476~