Recent Posts

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21
Brewery / Re: happy nacho day
« Last post by kambo on Today at 02:45:12 AM »
dont know about the nacho day but 12ax7 and me had some drinks by the ocean today  :P
22
The Lab / Re: Collins 26U1 Peak Limiter Power Transformer
« Last post by CJ on Today at 02:35:19 AM »
voltage doublers do not have very good regulation and they generate more ripple,  that is why you have the two choke filter circuit,

it would seem that you want good regulation for a compressor circuit, witness the stiff supply in the Fairchild 670,

so you would be upgrading the Collins with a full wave of bridge circuit,

a lot of TV sets in the old days used doublers, i do not know why, obviously money would be my first guess, i bet you can use a cheaper transformer, half the secondary turns required, which means you can use bigger wire and keep heat down,  there is a ton of math on doublers in RDH4 relating cap size vs regulation vs voltage vs peak rectifier/avg rectifier current and all sorts of gobbly goop that is only understood by Ham radio geeks and what not,  :D

23
Drawing Board / Re: B+ from voltage multiplier
« Last post by kambo on Today at 01:30:04 AM »
wow!


edit: too many characters on spelling


24
Drawing Board / Re: B+ from voltage multiplier
« Last post by Matador on Today at 01:04:45 AM »
you know what, i  think you are genius....
This method is tried and true.  Take a look at the Gyraf G9 power supply: it uses both methods.

25
Microphones / Re: Cloned C800G ?!
« Last post by Icantthinkofaname on Today at 12:24:04 AM »
K67.

CK12 is strangely enough closer to Neumann's k67.

CK12 from 797 audio is almost spot on Neumann's k67. How and why, have no idea. They dont even share the same construction...
I believe they tune the capsule. Apparently Guosheng of 3U Audio actually worked for 797 for a really long time, which is how he learned to design and tune capsules.

I may have asked this before, but for the Chinese "CK12s" and 797's K67, do you need as much de-emphasis as you do with the usual Chinese K67s sold by Mic Parts and Advanced Audio? i.e. is it still a 470-680 pF capacitor that's recommended?
26
Drawing Board / Re: B+ from voltage multiplier
« Last post by kambo on Today at 12:13:25 AM »
If it's a beefy heater transformer that you have, then it'd be OK to use another small heater transformer in reverse from that existing heater transformer's 9 -12v.  This is assuming this extra transformer can have its, what was, primary strapped for EU 240v AC.

you know what, i  think you are genius....



 
27
The Lab / Re: .156 Header with aprox. 1.2 inch long tails
« Last post by radardoug on August 16, 2019, 11:52:13 PM »
Have a look at this page, scroll down.
http://www.surplussales.com/ComputerAccess/IHJConnectors-3.html
(CPC) 85923-7
28
Brewery / Re: happy nacho day
« Last post by pucho812 on August 16, 2019, 11:48:33 PM »
I ... can't believe Nachos have a creator. It seems like the sort of thing that would be created anonymously centuries ago at 3 a.m. on a Sunday morning after a night of heavy drinking.
I thought a similar thing.
29
Microphones / Re: Cloned C800G ?!
« Last post by kingkorg on August 16, 2019, 11:07:12 PM »
K67.

CK12 is strangely enough closer to Neumann's k67.

CK12 from 797 audio is almost spot on Neumann's k67. How and why, have no idea. They dont even share the same construction...

30
Microphones / Re: Pronomic SCM-1
« Last post by Icantthinkofaname on August 16, 2019, 09:53:16 PM »
Hey,
I had a little bit of free time on my hands and dug a little deeper. So I found that a manufacturer called Byron Audio sells these types of microphones at very reasonable rates. They want 47$ for a pair of these mics ( MOQ 100) including two mic clips, windscreens and a wooden/aluminium box. They also sell these capsules for 7.70$ (MOQ 200). I don't know if they are affiliated with ISK or not but they seem to be identical.
Just FYI.  ;)

Best
Jannis
Got a link to their site? There are a couple Byron Audios I'm finding through Google.
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