[ARC Tech-109]

It's a 23 inch (25BHP22) and the third tube so far. First was a frosty with bad cataracts and low on emissions, second one I swapped in the summer of 83 that came from a C-II and it went another 20+ years before the emissions died off, this was around 2006 and was replaced with an RCA Hi-Lite from an unknown CTC before the set was parked in a big refrigerator box and stored in my parents barn.

It's been quite the journey but now it's back to its former glory and working like it did, most of the resistors and a number of capacitors were replaced along with the tuner after the accidental shorting of the IF cable to the 120V primary fuse. The picture is still vertically challenged but I'm going to let that go for now while I focus on the composite video input interface. One idea right now is to use a DPDT relay in conjunction with the rear audio selector switch that will cut the B+ feeding the IF amp itself and at the same time switch in the composite to that test terminal strip I soldered to the cover tin. Years ago when I added the Recoton MTS decoder I also wired in a 3P3T rotary which selects between the internal MTS and external R/L "simulcast" TV audio input so that way I could have the stereo audio from my U-Matic deck or the satellite we still had going, the 3rd contact set or position was never used so this could handle the switching of a relay as I need to keep the lead length to the 1st video amp very short to avoid smear.


I also received the SAMS 1144 folder this morning and will scan in the Magnavox as a complete set including the TV chassis, stereo receiver & amp chassis and the remote if you want to add these to your collection. Everything will be in a high-res pdf format and will overlap the large pages so things don't get cut off. Give me a few days and I will email it, if anyone else wants a copy drop me a private message and I will get it out to ya.

Here are a few of the audio details. The 45_Coil is exactly how I did it back in 1986 and it feeds a "probe" input on the Recoton FRED MTS decoder, originally they included this adhesive loop to grab some stray 4.5 MHz but that didn't work so I made the pickup instead and have it set to grab some from the 4.5 MHz trap.
Input switch selects between the MTS decoder and external R/L feeding the TV position of the receiver selector.

The hairy fan needs no explanation, the set doubles as a vacuum cleaner of cat hair.