6BL8_ECF80_E80CF_7643

Vintage Asylum

Classic gear from yesteryear; vintage audio standing the test of time.

Posted by Bambi B (A) on April 27, 2010 at 15:28:21

In Reply to: RE: No, but it's been done more or less, with the related 6GH8A posted by becketma@yahoo.com on April 27, 2010 at 13:21:36:

A McIntosh MR67 tube tuner (1964). The 6BL8 "Audio Amplifiers" are at the centre back- the two left of the back row in the photo above

Valvo E80CF red label, pinched waist, gold pin. You can just see the typical Philips double triangle getter support. All Philips, Amperex, Miniwatt, Mullard, and Valvo have this same design.

The Telefunken E80CF, which has the Telefunken construction of a wide, reinforced single bar getter support. Tubes labeled Telefunken and Siemens are both made by Telefunken

::::::::::::::::::::::

becketma,

I had the same experience- after trying the premium/military 6BL8- the E80CF/7643, I only looked to those. My impression was that the E80CF was more resolved and detailed, somewhat more energetic.

In 2005-6 the E80CF was inexpensive- the glamourous NOS Valvo red label pinched waist E80CF were $15 and many others were $5-8. The Telefunkens were more- $24 each, until I discovered that the Siemens are made by Telefunken- they have the diamond in the base- were $5 and $15. There's a clear demonstration that the Telefunken name makes the same tube cost more!

Checking German ebay.de- the best place to find the E80CF- I see prices have gone up, but these are still inexpensive compared to something like 12xx7's and 6DJ8 family stuff.

As the 6BL8 had not been made in nearly 30 years, I over-bought thinking I'd want enough to select from three types to fill the 6BL8 positions for two tube tuners for 30 years- and that would mean buying about 20 tubes. However, I bought twice that:

6BL8 /ECF80 /E80CF /7643 (2) TOTAL: 41

2- Telefunken E80CF- goldpin- NOS - [24
4- Philips Miniwatt ECF80-- Brazil- NOS -[5
4- Valvo E80CF Red lbl, pinch waist- gldpn–DE- NOS -[16
2- Philips SQ E80CF - Germany, gp-USED-TNOS -[8
4- Philips SQ / Mullard- E80CF- disc gtr- UK- NOS- [12
3- Siemens by Telefunken 7643- square gtr - gp- DE- NOS- [5
3- Amperex PQ E80CF-gp-Hamburg-db.gtr-NOS 64- [5
5- Siemens & H by Telefunken E80CF- gp- - NOS-[16
4- Amperex PQ 7643- gp- Hamburg- db.gtr s- NOS - [7
4- GE ECF80 -UK - NOS [2
2- RCA 6BL8- US - NOS [2
3- RCA ECF80 -France- NOS [2
1- Sylvania 6BL8- US [2

As I say, from the sound of the McIntosh MR67, I'd like to find a headphone preamp that can use the 6BL8/E80CF. Of course, a 6GH8A-based one would be the one.

Cheers,

Bambi B

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Follow Ups Full Thread

Topic - Anyone try 6BL8 as a driver in ST70? - bcguitar 14:09:34 04/26/10 (11)

No, but it's been done more or less, with the related 6GH8A - Bambi B 09:05:39 04/27/10 (7)

RE: No, but it's been done more or less, with the related 6GH8A - Eli Duttman 19:16:29 04/27/10 (0)

RE: No, but it's been done more or less, with the related 6GH8A - becketma@yahoo.com 13:21:36 04/27/10 (5)

6BL8_ECF80_E80CF_7643 - Bambi B 04/27/1015:28:21 04/27/10 (4)

RE: 6BL8_ECF80_E80CF_7643 - becketma@yahoo.com 22:39:18 04/28/10 (2)

Yes, I found only two European designs - Bambi B 06:59:15 04/29/10 (0)

RE: 6BL8_ECF80_E80CF_7643 - becketma@yahoo.com 22:42:41 04/28/10 (0)

Thanks for all the info and - bcguitar 19:19:22 04/27/10 (0)

RE: Anyone try 6BL8 as a driver in ST70? - Tom Bavis 05:51:27 04/27/10 (1)

Cool, thats what I thought. - bcguitar 08:32:09 04/27/10 (0)

RE: Anyone try 6BL8 as a driver in ST70? - Michael Samra 14:26:07 04/26/10 (0)

Follow Ups

6BL8_ECF80_E80CF_7643 - Bambi B 04/27/1015:28:21 04/27/10 (4)

RE: 6BL8_ECF80_E80CF_7643 - becketma@yahoo.com 22:39:18 04/28/10 (2)

Yes, I found only two European designs - Bambi B 06:59:15 04/29/10 (0)

RE: 6BL8_ECF80_E80CF_7643 - becketma@yahoo.com 22:42:41 04/28/10 (0)

Thanks for all the info and - bcguitar 19:19:22 04/27/10 (0)

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