[attmci]

https://en.wikipedia.org/wiki/Whirlwind_I

This is the competitor..... Whirlwind

 

[alvin sawdust]

Has anyone tried using a pair of A2293 / CV4079 in place of 6AS7G with one of these adapters?

https://www.ebay.co.uk/itm/1pc-Dual...h=item2f2379c67b:g:WisAAOSw2yVbtq1f:rk:5:pf:0

 

[wwmhf]

Has anyone tried using a pair of A2293 / CV4079 in place of 6AS7G with one of these adapters?

https://www.ebay.co.uk/itm/1pc-Dual...h=item2f2379c67b:g:WisAAOSw2yVbtq1f:rk:5:pf:0

Attempting, but I haven't tried anything like this idea yet. My concern is whether the amp is designed to support two tubes instead of one.

 

[Dogmatrix]

Attempting, but I haven't tried anything like this idea yet. My concern is whether the amp is designed to support two tubes instead of one.

2 A2293 draw less current than one 6AS7G in terms of heaters so that would be ok but one data sheet I saw said the A2293 has 12 volt heaters so that might be an issue . Although another said they run fine and with an extended life on 6 volts .

 

[alvin sawdust]

Current wise they look fine and the voltage is 6.3, same as 6as7g. Think I will give these a go.

 

[mordy]

Current wise they look fine and the voltage is 6.3, same as 6as7g. Think I will give these a go.

They are made by the same company as GEC (Marconi-Osram) so they should sound very good.

 

[alvin sawdust]

And most importantly they are reasonably priced. Have ordered the adapter.

 

[alvin sawdust]

Have a pair of GEC A2293 on their way to me from Germany. Hope to have them in my amp by the the beginning of next month fingers crossed.

 

[mordy]

What kind of amp do you have?

 

[alvin sawdust]

What kind of amp do you have?

Apex Teton otl.

 

[Dogmatrix]

I am also on board for this adventure ordered the adapter and a pair of CV4079 . Running a custom otl with similar tube set to the teton , single 6922/6sn7/6f8g driver , single 6080/6as7g output and a 274b rectifier .
Seem to be plenty of these tubes around one UK vendor I often use has near 4000 CV4079 listed in stock . Interested to see if there is much difference between early A2293 and later CV4079 . Found another equivalent which seems to be the final designation from the 80s CV8089 . Best see if they work first I suppose , might sound terrible .

 

[wwmhf]

I am also on board for this adventure ordered the adapter and a pair of CV4079 . Running a custom otl with similar tube set to the teton , single 6922/6sn7/6f8g driver , single 6080/6as7g output and a 274b rectifier .
Seem to be plenty of these tubes around one UK vendor I often use has near 4000 CV4079 listed in stock . Interested to see if there is much difference between early A2293 and later CV4079 . Found another equivalent which seems to be the final designation from the 80s CV8089 . Best see if they work first I suppose , might sound terrible .

Please report back whether it sounds better/equal/worse than/to/than a 6080/6as7g.

 

[alvin sawdust]

Good stuff Dogmatrix, will be good to compare notes. Thanks to Xulingmrs superb adapters i've had loads of fun trying out various equivalents. This will be the first time i've used an adapter in the 6AS7 birth.

 

[Dogmatrix]

Good stuff Dogmatrix, will be good to compare notes. Thanks to Xulingmrs superb adapters i've had loads of fun trying out various equivalents. This will be the first time i've used an adapter in the 6AS7 birth.

Same , I have a few driver adapters but nothing for the 6AS7G slot . Hoping for improved performance on low impedance cans . We will see soon if the Xmas parcels haven't started to clog the system already

 

[alvin sawdust]

Same , I have a few driver adapters but nothing for the 6AS7G slot . Hoping for improved performance on low impedance cans . We will see soon if the Xmas parcels haven't started to clog the system already

Would be interesting to know what the output impedance is on these. Anyone here able to work it out?