Interestingly, Drake used the 6FQ7 in their later TR-4C¡¯s and T-4XC¡¯s.?
I have not done any research on new tube availability and prices as they were in the 1970s. It could well be that the bulletin came out prior to Drake deciding to use the 6FQ7¡¯s to replace the 6EV7.?
Because none of these are available as new
Production, prices are established by supply and demand of the used and NOS tubes. I¡¯m willing to bet that there are many more 6EV7¡¯s available today. And, as you mention, there¡¯s really not a lot of electronic demand on these tubes, when used as relay controls.?
It¡¯s interesting, nevertheless.?
73,
Steve Wedge, W1ES
Time flies like an arrow. Fruit flies like a banana.
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On Wed, May 17, 2023 at 15:23, Rick WA6III <
myr748@...> wrote:
On Wed, May 17, 2023 at 02:00 AM, Steve Wedge, W1ES/4 wrote:
Perhaps that wasn¡¯t the case when the bulletin was written.?
?
Steve Wedge, W1ES/4
?
Time flies like an arrow. Fruit flies like a banana.
?
?
Sent from Proton Mail for iOS
?
?
That would make sense I guess.....?
I did do a search of different vacuum tube providers and just all of them listed the 6AQ8? as available but the prices were a little "out there" compared to the 6EV7's I found.? Many (or all) listed the 6EV7 as available too (including used and/or NOS on eBay) starting at $10-15
There's one seller on ebay that's selling 10 NOS 6EV7's for $50 + $10 shipping (+ tax of course)?? Making them about $7 each.
But for a double triode tube that is only used for something as simple as a VOX amp and relay driver, It appears that other subs good choices too.....( 6FQ7, 6GU7 )
?
--
73/Rick
WA6III
*Every post is created using Linux
