29-10-2016, 05:13 PM
(This post was last modified: 29-10-2016, 05:17 PM by Mike Watterson.)
I have a Taylor 65b from about 1944 or 1945. I have an original Taylor circuit which I added to.
It didn't need recalibrated.
Works well, though external modulation lacks sensitivity. The input line filter had gone "bang". So I put a modern filter. I added a three core flex and replaced the battery type RF out with BNC. I added a buffered BNC before the gain & Attenuator to drive a counter.
Modified:
I may have C9 & C10 the wrong way.
The schematic is from Taylor, but had NO values at all! So I added values.
I had to repair the modulation transformer, it had snapped/corroded rather than burning out, I only had to unwind a couple of layers and wind back on (it was the winding in series with RF osc Anode).
The Modulation transformer is on the 400Hz osc / audio amp and the the HT to RF is via 2nd winding.
Most of the faulty caps were on the PSU tag board.
I have a modern DDS based generator, but I often use the Taylor as it's simpler to change level or frequencies than the REALLY STUPID menu system on the DDS generator. Really in interests of saving cost the user interface on so many TVs, Test gear and Radio is garbage (TV has dark grey lettering on black panel without real buttons, purely touch sensitive. DAB/FM radio has slight mouldings on buttons, angled toward rear, Up/Down for volume and a menu that needs manual to set alarm or rescan or what ever.).
The Taylor works well and simple to use.
The attenuator uses alternate positions on switch to reduce leakage.
I think I have the manual, but unlike the DAB/FM alarm-clock radio or my Radio Time synchronised "insane to set up" Alarm clock / Analogue Radio, the manual is needed.
I can never remember how to store stations on my AM/FM Panasonic HiFi either. Nice motorised real volume control for remote.
It didn't need recalibrated.
Works well, though external modulation lacks sensitivity. The input line filter had gone "bang". So I put a modern filter. I added a three core flex and replaced the battery type RF out with BNC. I added a buffered BNC before the gain & Attenuator to drive a counter.
Modified:
I may have C9 & C10 the wrong way.
The schematic is from Taylor, but had NO values at all! So I added values.
I had to repair the modulation transformer, it had snapped/corroded rather than burning out, I only had to unwind a couple of layers and wind back on (it was the winding in series with RF osc Anode).
The Modulation transformer is on the 400Hz osc / audio amp and the the HT to RF is via 2nd winding.
Most of the faulty caps were on the PSU tag board.
I have a modern DDS based generator, but I often use the Taylor as it's simpler to change level or frequencies than the REALLY STUPID menu system on the DDS generator. Really in interests of saving cost the user interface on so many TVs, Test gear and Radio is garbage (TV has dark grey lettering on black panel without real buttons, purely touch sensitive. DAB/FM radio has slight mouldings on buttons, angled toward rear, Up/Down for volume and a menu that needs manual to set alarm or rescan or what ever.).
The Taylor works well and simple to use.
The attenuator uses alternate positions on switch to reduce leakage.
I think I have the manual, but unlike the DAB/FM alarm-clock radio or my Radio Time synchronised "insane to set up" Alarm clock / Analogue Radio, the manual is needed.
I can never remember how to store stations on my AM/FM Panasonic HiFi either. Nice motorised real volume control for remote.
