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 6BL7
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 Return to top of page · Post #: 1 · Written at 5:49:02 PM on 5 August 2019.
Jhndragoon's Gravatar
 Location: Sydney, NSW
 Member since 26 July 2019
 Member #: 2369
 Postcount: 14

Any one got some for sale?


 
 Return to top of page · Post #: 2 · Written at 7:41:20 PM on 5 August 2019.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6349

Jhndragoon, at this time, trading on this site is not permitted. I apologise for the inconvenience but the Wanted and For Sale Forum is under a bit of a redevelopment and there is a temporary non trade rule in place until this work is done.


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A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 3 · Written at 7:49:32 PM on 5 August 2019.
Jhndragoon's Gravatar
 Location: Sydney, NSW
 Member since 26 July 2019
 Member #: 2369
 Postcount: 14

Sorry .look forward to reopening of the for sale or wanted forum
A valve a day is not enough!


 
 Return to top of page · Post #: 4 · Written at 7:56:52 PM on 5 August 2019.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6349

That is one thing I do agree with. Wink


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A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 5 · Written at 8:21:41 PM on 10 August 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1905

You should be able to use the much more readily available 6SN7. Plug compatible.

What's the application?

Am I allowed to make recommendations as to where you can get them? Else there's my email address - I don't have any to sell BTW


 
 Return to top of page · Post #: 6 · Written at 7:03:00 PM on 11 August 2019.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6349

If a place that has them is known, this can be posted, yep.


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A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 7 · Written at 1:47:33 PM on 13 August 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1905

I got a couple of 6BV7s (rare and hard to get) from this link last week, they list the 6BL7GTA:

https://www.evatco.com.au/audio-tubes/nos-tubes/

Here is a US source that's always worked for me esp. for TV valves. They list the 6BL7GTA for US$9.95

https://tubedepot.com/products


 
 Return to top of page · Post #: 8 · Written at 10:36:57 PM on 13 August 2019.
Jhndragoon's Gravatar
 Location: Sydney, NSW
 Member since 26 July 2019
 Member #: 2369
 Postcount: 14

They are the best solution to drive 2a3 op valves however I have seen 6sn7s as cathode followers used as well. the tube depot is noted however I'm sure some are left over here locally from the b&w TV days I will open up my email address in the tool box.
When Impedance is important!


 
 Return to top of page · Post #: 9 · Written at 6:11:20 PM on 15 August 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1905

OK I see what you are doing.

You can't drive them into grid current (and extract max power) with cap coupling so it's either a transformer or cathode followers.

I ran this up on LTSpice a couple of years back and I was pleasantly surprised at what you can get out of a pair of 6BQ5s driven this way. The characteristics of the triodes you use as emitter followers don't matter much, 12AU7s, 6CG7s etc all will work.


 
 Return to top of page · Post #: 10 · Written at 10:36:43 PM on 15 August 2019.
Jhndragoon's Gravatar
 Location: Sydney, NSW
 Member since 26 July 2019
 Member #: 2369
 Postcount: 14

I think of a emmiter follower with an ac126 or af117n in circuit but maybe a couple of 6bq5s used as a triodes might work or I might try ecc99 or soviet eqv


 
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