| Forum: Klaus Heyne's Mic Lab |
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| Topic: TAB-Funkenwerk Transformer Service On L.A. Craigslist |
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| Re: Tab Tranny and mic tuning service on Craiglist [message #376969 is a reply to message #376573 ] |
Mon, 06 October 2008 16:03 |
 brett
Messages: 872
Registered: May 2004
Location: Hollywood, CA |
Gold Member |
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Thanks, I think I will give him a call.
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| Topic: What tube in Siemens u47? |
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| Re: What tube in Siemens u47? [message #376873 is a reply to message #376793 ] |
Mon, 06 October 2008 07:38 |
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Oliver Archut
Messages: 659
Registered: April 2004 |
Gold Member |
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The few Siemens or better Klangfilm U47s that I saw, came stock with a KL70715 what is a EF12, most everything is the same aside the fillament dropping and a different kathode resistor. If I remember right it was about 2kOhm with no bypass cap at all.
The mic had a Siemens logo and a Klangfilm batch at the back bottom of the body tube.
Sounded a bit funky, the PSU was a Siemens made.
Best regards,
Oliver Archut
www.tab-funkenwerk.com
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| Re: What tube in Siemens u47? [message #376875 is a reply to message #376793 ] |
Mon, 06 October 2008 07:44 |
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Oliver Archut
Messages: 659
Registered: April 2004 |
Gold Member |
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Here is a pic of a Klangfilm audio tube.
Attachment: KL70717.JPG
(Size: 58.55KB, Downloaded 131 time(s))
Oliver Archut
www.tab-funkenwerk.com
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| Re: What tube in Siemens u47? [message #376959 is a reply to message #376793 ] |
Mon, 06 October 2008 15:22 |
Giles Jeremy
Messages: 24
Registered: October 2007 |
Member |
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Very Interesting!
So, why the EF12?
Were VF14's starting to be difficult to get hold of.
I didn't realise that the EF12 could be used with the same
components values ( apart from the heater voltage and the cathode resistor ) as the VF14.
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| Re: What tube in Siemens u47? [message #376978 is a reply to message #376793 ] |
Mon, 06 October 2008 16:39 |
strangeandbouncy
Messages: 22
Registered: July 2008
Location: UK |
Member |
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Hi Guys,
Wow! interesting stuff! `Guess I'll be looking for an EF12(k) then, if it will work with minor mods. can't seem to find a good EF14 anywhere . . . . . I've got 3 ex wehmacht ww2 ef14's that pick up more audio than the capsule!
many many thanks,
ANdyP
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| Re: What tube in Siemens u47? [message #376981 is a reply to message #376978 ] |
Mon, 06 October 2008 16:53 |
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Klaus Heyne
Messages: 2144
Registered: April 2004 |
Platinum Member |
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Do you have an authentic Siemens 47 you wish to restore for sale?
If not, don't bother with the EF12. The VF14 is the proper tube to get you the authentic U47 sound. The Klangfilm/Siemens versions were specialty mics whose audio was questionable to start with.
Klaus Heyne
German Masterworks
www.GermanMasterworks.com
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