- #61 [timtube], 12-02-21 00:56The famous "swing" Klangfilm cabinet to allow for easy maintenance.
- #62 [timtube], 12-02-21 18:02Klangfilm KL73551 = Siemens F2a11
- #63 [lowther_chan], 12-02-21 18:08Oh F2a11, so sexy!
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- #64 [timtube], 12-02-22 10:04Info on F2a11 from "Tube Classic":
The F2a11 is electrically the same as the famous "post tube" F2a, which was used in many 1950s and 1960s telegrafic amplifiers by the German Post. The only difference is the socket.
Concerning the Siemens audio amplifiers the F2a11 substituted the EL12 (as in the Klangfilm 401 amp and changing to the 402/403 amp) and finally was substituted by the more common EL84 in lower power applications and by the EL34 where more power was necessary.
F2a11s are reliable and great sounding audio tubes in push-pull amps with up to 30 watts or in single ended stages up to 7 watts. Other famous amps using F2a11 tubes are the Telefunken V69 and the V69a.
All F2a11 were made by Siemens in their home plant. - #65 [timtube], 12-02-22 11:51Klangfilm KL-V401 designed for Telefunken EL12 and "Mesh Plate" RGN2504!
- #66 [eric300], 12-02-22 12:13Timtube C Hing, thanks to your details information.Learn a lot ! Which model is the best KF model in your personal opinion ?
- #67 [kslsfz], 12-02-22 12:46EL12 is exceptionally good and affordable!
I think it will beat 6V6,6L6,EL34 and even KT77 as a driver for 300B. Imho on the same league as WE349. - #68 [timtube], 12-02-22 13:47Before we talk about which KF amp is the best, maybe we should talk more the product range/history of KF post-war amps first.
The first post-war KF amp is KL-V401 (EL12 PP 9W).
This was replaced by KL-V402/403 (F2a11 PP 15W) with KL-V203/204 (F2a11 SE 3W) as back-up amp.
This was again replaced by KL-V502 (EL34 PP 28W) with KL-V408/408a (EL34 PP 30W) as back-up amp.
There was also a 2nd line offering with KL-V408/408a as main amp and KL-V410 (EL84 PP 10W) as back-up amp.
最後修改時間: 2012-02-22 13:48:50 - #69 [timtube], 12-02-22 14:28Therefore, the "flagship" amps for Klangfilm should be V401, V402/403 and V502 at various points in time. The others are either back-up amps or 2nd line offerings.
I have a pair of working V502, a pair on non-working V403, and I have never heard the V401.
But I think it is not appropriate to compare the 3 amps as their output powers are so different.
However, there is no doubt to me that the V502 is one of the best EL34 PP amps ever made.
And the V410 is probably the best sounding EL84 PP amp in the world.
最後修改時間: 2012-02-22 14:29:38 - #70 [timtube], 12-02-22 15:40Telefunken EL12 was first introduced in 1938.
- #71 [kslsfz], 12-02-23 08:24timtube hing,
I am thinking of driving 300B with some European pentode with plate dissipation of around 6 to 12W. EL12 has plate dissipation of 18W which is too high imho. Maybe the 'ancestor' of EL84 @ 12W will do. Are you aware of such tube in the EL family?
Below are the pd of some common pentodes
EF12 1.5W
WE348a/WE310a 2W
WE349a 12W
C3g 3.5W
C3m 4W
D3a 4.2W
E2d 10W
6F6 8.5W
6V6 13.2W - #72 [timtube], 12-02-23 09:37There is also an earlier Telefunken EL11, which has only 1/2 the power of EL12 at 9W max.
- #73 [timtube], 12-02-23 09:54There is a AL4 with P-base and similar power as EL11.
- #74 [timtube], 12-02-23 11:27This is the predecessor of EF12 - the 6.3V EF7.
- #75 [timtube], 12-02-23 11:28Also available in gold.
[img]http://www.vintageradio.nl/Buizen/Foto's/ef7%20(Telefunken).jpg[/img]
最後修改時間: 2012-02-23 11:32:13 - #76 [kslsfz], 12-02-23 19:30Thank you.
EL11 looks quite ok with similar rating to EL84. The EF tubes are too weak for driving 300B.
I'll try to get a pair of EL11 and do a shootout with WE349a later. Any of these should do a better job than WE310a - #77 [timtube], 12-02-24 12:20Klangfilm KL-V502 with F2a11 and RGN2504 vs. Shindo Sinhonia with F2a.
- #78 [timtube], 12-02-24 15:42The globe mesh plate Telefunken RGN2504 is one of the very few tubes that sound better than engraved base WE374B to my ears.
- #79 [timtube], 12-02-24 15:44Telefunken RGN2504 = Klangfilm KL76303
- #80 [eric300], 12-02-24 16:10timtube Hing, V502 and Sindo
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