Converting Audiomaster 11A / EL34 to Run F2a11 |
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回覆 (10): Converting Audiomaster 11A / EL34 to Run F2a11
 
Alan  
 
As an Audiomaster user, when will you show up?  
 
John  
 
Gingers
09-02-04
19:53:10
回覆 (9): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers ~ You might also consider replacing some of the carbon resistors with Shinkoh Tantalum , esp in the signal path , they bring superb clarity however do not sound over bright and etched as metal films can , they are superbly musical .  
 
I have spent many hours trialing various passive componants and have found that a few select components can allow the 11A to *Breath* and take it to another level
Tsushima1
09-02-02
23:40:10
回覆 (9): Converting Audiomaster 11A / EL34 to Run F2a11
 
I remembered someone said TCC normal Metalpack sounded better than Super Metalpack :-) But if you are going to change, get 2 extra pieces for me for my Beam Echo :-)  
 
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Personally I think Super Metalpack has the same material as Metalpack inside the capacitor. You may need more time to warm up the Super Metalpack capacitors.  
 
 
 
 
Gingers
09-02-02
22:13:39
回覆 (8): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers,  
 
I remembered someone said TCC normal Metalpack sounded better than Super Metalpack :-) But if you are going to change, get 2 extra pieces for me for my Beam Echo :-)  
AceHayashi
09-02-02
19:45:04
回覆 (8): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-02-01
22:07:43
回覆 (7): Converting Audiomaster 11A / EL34 to Run F2a11
 
Thnking to replace 0.05uF to TCC Super Metalpack.  
Any comment :-)  
 
Gingers
09-02-01
22:04:13
回覆 (6): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers ~ Yes they are Very Nice , Beautifully smooth and detailed with very little sonic compression .  
They are very similar in many respects to high quality vintage such as VitQ's or TCC tonally , however the Mundorfs to my ears perhaps have a touch more clarity.  
 
I think that a combination of V-Cap Teflon at 0.047uf combined with TCC or Mundorf Silver Oil for 0.47uf is a very Nice Recipe .
Tsushima1
09-02-01
18:27:09
回覆 (7): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-02-01
17:10:00
回覆 (6): Converting Audiomaster 11A / EL34 to Run F2a11
 
I am using TCC capacitors.  
 
Gingers
09-02-01
17:08:40
回覆 (5): Converting Audiomaster 11A / EL34 to Run F2a11
 
Are the MCap good?  
 
Gingers
09-02-01
17:07:08
回覆 (10): Converting Audiomaster 11A / EL34 to Run F2a11
I am Very keen to try tim , hopefully I can discover the exact details required .  
 
I have recently set up a single test 11A with 0.47 uf V-Cap Teflon coupling capacitors ~ Very Impressive !!!  
 
Shall shortly try a V-Cap 0.047 uf also as I feel this to be a very important capacitor in the 5-20 circuit  
 
Tsushima1
09-01-31
22:58:05
回覆 (10): Converting Audiomaster 11A / EL34 to Run F2a11
Beside the F2a11, Alan also modified the E283CC to be used in the 11A instead of ECC83.
timtube
09-01-31
22:46:52
回覆 (9): Converting Audiomaster 11A / EL34 to Run F2a11
F2a11 on Audiomaster 11A - the ultimate modification?
timtube
09-01-31
22:45:14
回覆 (8): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:37:20
回覆 (9): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:36:29
回覆 (8): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:35:29
回覆 (7): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:34:28
回覆 (6): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:33:40
回覆 (5): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:32:52
回覆 (4): Converting Audiomaster 11A / EL34 to Run F2a11
Roger,  
 
The adaptors are commercial available from Vinatge Sound. Please e-mail Vincent at [email protected] for details.  
 
I will see if I can make contact with Dieter to get you the value for the F2a11 bias resistors.
timtube
09-01-31
22:32:10
回覆 (6): Converting Audiomaster 11A / EL34 to Run F2a11
Gingers
09-01-31
22:31:32
回覆 (5): Converting Audiomaster 11A / EL34 to Run F2a11
 
Great to see a thread for Audiomaster 11A :-)  
 
Gingers
09-01-31
22:30:31
回覆 (4): Converting Audiomaster 11A / EL34 to Run F2a11
 
 
Roger  
 
Thanks for sharing :-)  
 
http://s177.photobucket.com/albums/w220/Tsushima1/
Gingers
09-01-31
22:25:24
回覆 (3): Converting Audiomaster 11A / EL34 to Run F2a11
John ~ Yes those look like mine  
 
timtube ~ Thank you for the information, I am hoping for details of which resistor together with the the exact resister values required ?  
 
I would be prepared to DIY a set of socket addaptors if the necicary information is availible ? if not I did note that some company in Germany was selling such an addapter however I have lost the deatails in a hard drive failier !  
 
Try again with the image ~  
 
http://s177.photobucket.com/albums/w220/Tsushima1/?action=view¤t=819a.jpg
Tsushima1
09-01-31
22:15:14
回覆 (4): Converting Audiomaster 11A / EL34 to Run F2a11
 
 
Roger  
 
May I know how you can find here,i.e. www.1pekingroad.com?  
 
John  
 
Gingers
09-01-31
22:09:47
回覆 (3): Converting Audiomaster 11A / EL34 to Run F2a11
 
You are most welcome if you agree to sell them to me :-)  
 
:P  
 
Gingers
09-01-31
22:08:27
回覆 (2): Converting Audiomaster 11A / EL34 to Run F2a11
Thank you for the welcome John ,  
 
I am thinking of converting this pair ~
[IMG]http://i177.photobucket.com/albums/w220/Tsushima1/819a.jpg[/IMG]
Tsushima1
09-01-31
22:05:18
回覆 (2): Converting Audiomaster 11A / EL34 to Run F2a11
There are only 2 modifications needed for the 11A to run F2a11 :  
 
1) to buy/make 4 octal to Y8 adaptors  
 
2) to change the self-bias circuit to cater for the operating point of F2a11 (which would not bias correctly in a EL34 amp)  
 
I understand 2) is very simple and 100% reversible. But Dieter is no longer in HK and may be difficult to reach :c
timtube
09-01-31
22:01:54
回覆 (2): Converting Audiomaster 11A / EL34 to Run F2a11
 
 
Roger  
 
Are you the owner of this quad of Audiomaster ?  
 
Joihn  
Gingers
09-01-31
22:01:22
回覆 (1): Converting Audiomaster 11A / EL34 to Run F2a11
 
Roger  
 
Welcome.  
I was told that Mr Dieter Wolbart made it.  
 
John  
 
Gingers
09-01-31
21:56:03
Converting Audiomaster 11A / EL34 to Run F2a11
Greetings Everyone .  
 
My first post here on this exciting new forum .  
 
I would very much appreciate some information regarding the alterations that need to be made to the 11A circuit required in order to run the Audiomaster with F2a11 valves ?  
 
I would also be most grateful should any member have any information regarding where I might purchase the necessary valve adaptor sockets for such a conversion project ? I am residing in London UK  
 
Regards  
 
Roger  
 
Tsushima1
09-01-31
20:59:08
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