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[#3541] LS3/5A 同好會    
I must say that only 12.1 and 25 are only using double chamber bobin winding output transformer.

TL12+
TL25+
in fact they should marked as TL12(-) and TL25(-)

Skill to push downgrade product.
Heath is the same bad, take out the nickel lamins from later W5M and make newer output transformer without nickel, however bigger in size.



diytfy
個人訊息 會員
155.xxx.xxx.45
2004-12-03 11:22
[#3542] LS3/5A 同好會    
Leak TL12.1 and Leak TL25/A.

Middle pair is TL25/A!

pang

M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 12:00
[#3543] LS3/5A 同好會    
Has someone bold enough to try connecting TL25+ as triode output and compare with TL12.1? Using same set of KT66 of course.
F2aYeung
個人訊息 會員
61.xxx.xxx.70
2004-12-03 13:12
[#3544] LS3/5A 同好會    
There is often confusion among the following amp from Leak :

TL12.1 = KT66 Triode
TL25 = KT66 Pentode
TL12+ = EL84 UL
TL25+ = EL34/KT66/5881 UL

TL25 is ultra rare and particularly impossible to find regardless of price. TL12.1 has been very rare but perhap not any more seeing the number of owners here in R33.

TL12+ and TL25+ are among the most commonly found tube monoblock from Leak and cost may be less than half the price of TL12.1.

All 4 probably work well with LS3/5A.
----------------------------------------------

Tim

Where is TL/25A? The pair Pany owns : )


John
Gingers
個人訊息 會員
210.xxx.xxx.228
2004-12-03 13:37
[#3545] LS3/5A 同好會    
All 4 probably work well with LS3/5A.
------------------------------------------

Tim

I would say
All 4 work well with LS3/5A : )
Any chance my Leak TL/25 Plus meets your 11A : )


John
Gingers
個人訊息 會員
210.xxx.xxx.228
2004-12-03 13:53
[#3546] LS3/5A 同好會    
"Has someone bold enough to try connecting TL25+ as triode output and compare with TL12.1? Using same set of KT66 of course."

It would likely be a difficult battle for the triode-connected TL25+. Notably TL25+ has a lower grade output transformer than TL12.1 has.

r
rcwy
個人訊息 正式會員
221.xxx.xxx.250
2004-12-03 14:24
[#3547] LS3/5A 同好會    
John,

TL25A is actually a later version of TL25. I understand the only different is the bias tube. TL25A uses KT61 and TL25 uses some unknown type.

I understand Alan is taking his 11A to meet your TL25+ very soon. As for me, I prefer those Mullard 5-20 amp with choke filter rather than those which do not.

T
timtube
個人訊息 會員
210.xxx.xxx.172
2004-12-03 15:29
[#3548] LS3/5A 同好會    
Pang,

Shoot photo of your amps in a quality as extremely high as your vintage amps ma..! ^___^

r

rcwy
個人訊息 正式會員
221.xxx.xxx.250
2004-12-03 15:35
[#3549] LS3/5A 同好會    
R,
Really poor image!
I shot it at night time. The flash makes the image looks poor!
May be i take it during the day time. >--<

pang
M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 15:50
[#3550] LS3/5A 同好會    
This one is better!
BUT, still poor when compare with others. @-@
pang

M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 15:53
[#3551] LS3/5A 同好會    
For Leak TL12.1 and TL25/A.

M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 15:56
[#3552] LS3/5A 同好會    
My lovely rogers!

M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 15:59
[#3553] LS3/5A 同好會    
Pang - You have bought these bottom plates already, haven't you?

rcwy
個人訊息 正式會員
221.xxx.xxx.250
2004-12-03 16:01
[#3554] LS3/5A 同好會    
R,

I got the photos days before!
still thinking.

(TL25)

pang

M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 16:07
[#3555] LS3/5A 同好會    
The circuit also show the KT61 being used in TL25. If this is the case, then is there any difference between TL25 and TL25A? Anyone know?
timtube
個人訊息 會員
210.xxx.xxx.172
2004-12-03 16:09
[#3556] LS3/5A 同好會    
Tim

The TL/25A was a revision of the original TL/25 from the late 1940's which used cold-cathode tubes to derive the screen supply instead of the KT61 used here (information supplied by Patrick Cheffins).

pang
M6
個人訊息 會員
218.xxx.xxx.195
2004-12-03 16:12
[#3557] LS3/5A 同好會    
The TL/25A was a revision of the original TL/25 from the late 1940's which used cold-cathode tubes to derive the screen supply instead of the KT61 used here (information supplied by Patrick Cheffins).
--------------------------------------------------
Pang,

That is what I heard too. But that is not what the circuit diagram said.

timtube
個人訊息 會員
210.xxx.xxx.172
2004-12-03 17:15
[#3558] LS3/5A 同好會    
I understand Alan is taking his 11A to meet your TL25+ very soon.
I prefer those Mullard 5-20 amp with choke filter rather than those which do not.

----------------------------------------------

Tim

I use Tall feet seven and hope my 25+ did not lose to much. I have a pair of modified EICO HF50, each with a choke : )

John
Gingers
個人訊息 會員
210.xxx.xxx.228
2004-12-03 17:26
[#3559] LS3/5A 同好會    
Not taken with a M6 : )

Gingers
個人訊息 會員
210.xxx.xxx.228
2004-12-03 17:43
[#3560] LS3/5A 同好會    
M6,

"My lovely rogers!"

Yes, but.. pls also see below. ^___@

rcwy
個人訊息 正式會員
221.xxx.xxx.250
2004-12-04 07:12
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