VLF TR Arado

[Zocky-Zocky]

Dear frends!
Please Help!!!
Is there a schematic of the VLF TR Arado detector?
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If any of you has a scheme of this machine, the most beautiful I begged him to publish it in this topic.
Thanks in advance!
Zocky-Zocky

[Zocky-Zocky]

More pictures:

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And here is a link to the original site:

http://aradodetectors.services.offic.../Nostalga.aspx

[alnamr]

see thes






Parts list:

* U1: CD4011
* U2: LM78L05
* R1: 2.2k 5%
* R3: 330k 5%
* R4: 270k 5%
* R5: 1k 5%
* C1: 390pF (NPO)
* C2, C3: 10nF
* C4: 100nF
* C5: 100uf 16V electrolytic
* C6: 220uF 16v electrolytic
* C7: 100nF ceramic
* P1: 4.7k lin.
* L1: 22cm in diameter with 14 turns AWG 26
* K1: SPDT toggle switch
* J1: Headphone jack 1/4 or 1/8 inch
* Other parts: 9v battery connector, headphones"


click here

[Qiaozhi]

It's a simple BFO.