[Milsurplus] German E10K Receiver Revival- Preview

[David Stinson]

I'm near finishing the revival of a 1941 Lorenz German E10K aircraft 
receiver.  3-6 MC, like a BC-454. Beautiful and impressive build.

https://photos.app.goo.gl/N3p26TW7NjbAqvwv8
https://photos.app.goo.gl/MHBHWoeUC1dPeW3f8
https://photos.app.goo.gl/ciPHjZd6xcgkvq3V6
https://photos.app.goo.gl/ob84VzWMoftVDmQX6

I found NO bad capacitors and only one resistor which needed "tweeking." 
Working on a write-up.

One thing I investigated was preserving the original parts by running 
the receiver on lowered B+. I'm using an external amplified speaker with 
volume control and will cover why in the write-up.

Speced B+ is 210VDC. I found the best S/N ratio and least distortion 
with very acceptable performance was with a B+ of 90VDC.  Even cooler: 
playing merrily at 90V, the set draws a whopping
7 milliamps on the B+ buss.

https://photos.app.goo.gl/3DMih5Jd5VCD1bFX8

I measured it twice to be sure.
A stack of alkaline 9V batteries, which can usually source 1 Amp-Hour, 
would run this rig for around 120 hours+.  The TORN e.B. "battery"
infantry set draws better than three times this amount.

More when I get the article done.

GL OM ES 73 DE Dave AB5S




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