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Author Topic: AC701 at Tube Depot  (Read 2422 times)

AusTex64

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AC701 at Tube Depot
« on: July 17, 2016, 01:03:29 am »

Received this in an email from Tube Depot today:

https://tubedepot.com/products/ac701

They make some interesting claims regarding AC701 made after 1965, foremost that there is no difference between AC701 and AC701k if made after 1965. Curious what you lads have to say about that?
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Piedpiper

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Re: AC701 at Tube Depot
« Reply #1 on: July 17, 2016, 01:40:28 am »

Got that today also. Was also surprised by their price. Seems like they were half that last I looked...
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row row row your boat...

Pied Piper Productions

klaus

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Re: AC701 at Tube Depot
« Reply #2 on: July 17, 2016, 02:32:26 am »

They make some interesting claims regarding AC701 made after 1965, foremost that there is no difference between AC701 and AC701k if made after 1965. Curious what you lads have to say about that?
Tube Depot is correct: the AC701's quality improvements lead to the omission of the now redundant "k" (low microphonics).

What that leaves out is that far too many of these, "k" or post- "k" tubes were not automatically suitable for microphone use- further, long-term, selection in situ is necessary:
http://repforums.prosoundweb.com/index.php/topic,1150.0.html

What's not correct on Tube Depot's AC701 web page: Telefunken did not issue the fake East German copies with the white lacquer dot (indicating the anode lead). Neumann never equipped any of its mics with these RFT-made tubes, nor were they offered as spare parts.
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com
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