this page shows the schematics for the station radio
wireless set C13
individual images are links to their high resolution images
![schematics table of contents](thumb.C13-N-manual0053.jpeg) | | | ![](thumb.C13-N-manual0056.jpeg) |
table of contents | | | |
![](thumb.C13-N-manual0057.jpeg) | ![film strip dial](C13-N-manual0058.jpeg) | | ![](thumb.C13-N-manual0060.jpeg) |
| film strip cam | | |
it really does fold out like this, the real image is amazing. It is
truly the roll royce of radios
| | ![](thumb.C13-N-manual0064.jpeg) |
| | ledex rotary relay |
| ![composite relay diagram composite relay diagram](thumb.C13-N-manual0066.jpeg) | ![](thumb.C13-N-manual0067.jpeg) |
| summary of relays | |
| | |
| | |
| ![](thumb.C13-N-manual0078.jpeg) |
|
| | the C13 external PSU |
![external psu unit](thumb.C13-N-manual0080.jpeg) | ![block diagram complete system](thumb.C13-N-manual0081.jpeg) | ![block diagram complete system](thumb.C13-N-manual0082.jpeg) |
| calibration system | receiver block diagram |
![block diagram complete system](thumb.C13-N-manual0083.jpeg) | blank | blank |
transmitter block diagram | | |
![schematic transmitter section schematic transmitter section](thumb.C13-N-manual0084.jpeg) | ![schematic if amp fm limiter section schematic if amp fm limiter section](thumb.C13-N-manual0085.jpeg) |
| |
![main if amp, bfo, audio, PM discriminator main if amp, bfo, audio, PM discriminator](thumb.C13-N-manual0086.jpeg) | ![rf front end, first mixer, xtal bank oscillator vfo rf front end, first mixer, xtal bank oscillator vfo](thumb.C13-N-manual0087.jpeg) |
| |
![external PSU module external PSU module](thumb.C13-N-manual0088.jpeg) | The psu was the only dissapointing part of the system. It needed 24V at
a gazillion amps. The vibratory supply gave poor regulation. I should
have fed mine with 24V AC and replaced the vibrator with diodes but I didnt have a schematic and reverse engineering it was
impossible due to its ultra compact construction. Instead I
biult
my own DC regulated supply which allowed the C13 to truly shine.
My reverse engineering was accomplished by monitoring the power harness
voltages under various operational conditions and designing something
that behaved the same ! The older C42/45 used a solid state inverter. |
External PSU | |
![intercomm amplifier](C13-N-manual0089.jpeg) | ![valve filament hi current wiring valve filament hi current wiring](thumb.C13-N-manual0090.jpeg) | ![block diagram complete system](thumb.C13-N-manual0091.jpeg) |
the "intercomm" amplifier chassis | valve heater chain | |
![block diagram complete system](thumb.C13-N-manual0092.jpeg) | ![](thumb.C13-N-manual0093.jpeg) | ![](thumb.C13-N-manual0094.jpeg) |
| | |
![](thumb.C13-N-manual0095.jpeg) | ![](thumb.C13-N-manual0096.jpeg) | ![dial filmstrip details](thumb.C13-N-manual0097.jpeg) |
| | film sproket mechanism |
![](thumb.C13-N-manual0098.jpeg) | ![](thumb.C13-N-manual0099.jpeg) | blank |
| film sprocket mechanism detailed | |
![](mod-record.jpg)
using tables to improve layout, low res thumbs to improve display speed
Tue May 6 17:42:57 EST 2008, fix some errors Tue Jan 5 18:29:07 EST 2010