U47 style pcb on ebay

[wlinart]

https://www.ebay.com/itm/Tube-Condenser-Microphone-Circuit-Board-Motherboard-Based-Nuemann-U47-Circuit/312367052143?_trkparms=aid%3D333200%26algo%3DCOMP.MBE%26ao%3D1%26asc%3D55583%26meid%3D679d106b2c4e4dff9d508ceb11ef73ac%26pid%3D100008%26rk%3D3%26rkt%3D11%26sd%3D312367235130%26itm%3D312367052143&_trksid=p2047675.c100008.m2219

Saw this on ebay. Doesn't look like a u47 to me, just a generic tube microphone circuit. The tube type isn't mentioned, and the transformer is completely generic. Anyone recognises the circuit?

 

[Khron]

Whatever it is, $88 for a board, some random tube and a couple resistors? That's M-P levels of rip-off  :

 

[wlinart]

Yeah, it is a complete rip-off, probably $10 in components 
But still a little bit curious about it.

 

[RuudNL]

This looks in nothing like a U47 circuit.
Miniature tube (they blurred the type number!), small transformer and cheap components.

 

[analogguru]

.....
Miniature tube (they blurred the type number!), .....

From the description:

Using a US-made JANXXX model tube,....

So the US-made tubes are shipped to china, sweet 12 year old virgins are putting them into the pcb under the moonlight...... everything has its price....
.
.

 

[kingkorg]

However that guy has some cool stuff on his page. Edge terminated capsule for cheap, shipping included. And one very interresting electret capsule i havent seen before

 

[Icantthinkofaname]

That seller also has a solid state condenser PCB that's $230 or so.

However that guy has some cool stuff on his page. Edge terminated capsule for cheap, shipping included. And one very interresting electret capsule i havent seen before

Are they the RK-12 or some other one?

 

[kingkorg]

Seems to be Advanced Audio AK12 type. However it is cardioid only.
https://www.ebay.com/itm/1pc-34mm-Large-Diaphragm-Condenser-Microphone-Cartridge-Core-For-Blue-Mic/312339454897?hash=item48b8e1dbb1:g:nc4AAOSwa1Zb~J9I:rk:49f:0

I haven't seen this one before! It is a bit pricey for an electret, but if we find the source...

https://www.ebay.com/itm/25-7mm-Diaphragm-Condenser-MIC-Capsule-Microphone-Cartridge-Electret-Cardioid/312367333741?hash=item48ba8b416d:g:Vk8AAOSwe6JcD3uH:rk:45f:0

 

[Icantthinkofaname]

Seems to be Advanced Audio AK12 type. However it is cardioid only.
https://www.ebay.com/itm/1pc-34mm-Large-Diaphragm-Condenser-Microphone-Cartridge-Core-For-Blue-Mic/312339454897?hash=item48b8e1dbb1:g:nc4AAOSwa1Zb~J9I:rk:49f:0

I haven't seen this one before! It is a bit pricey for an electret, but if we find the source...

https://www.ebay.com/itm/25-7mm-Diaphragm-Condenser-MIC-Capsule-Microphone-Cartridge-Electret-Cardioid/312367333741?hash=item48ba8b416d:g:Vk8AAOSwe6JcD3uH:rk:45f:0

I believe Rayking makes that CK12 capsule as well, I've seen it on their site and Alibaba store. I'll check their Alibaba store when I get home for that electret capsule. I'm at work right now.

That small diaphragm capsule doesn't appear to be made by Rayking.