output transformers

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andrew Ivimey
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#61

Post by andrew Ivimey »

You've got 1 day and four hours to go, Colin!
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ed
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#62

Post by ed »

If you don't get'm Colin there is always this chap...the're still $200 a pair new

http://euphoniaaudio.netfirms.com/ea/nf ... /index.php
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pre65
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#63

Post by pre65 »

Hi Colin-if you send him an e-mail and ask for a quote you MIGHT get a better price

sandy85272002@yahoo.com.tw


i did not get mine via e-bay,but direct from him.
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colin.hepburn
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#64

Post by colin.hepburn »

Hi All
Well next week I am thinking to order my SE. output TX I have been looking at the James JS-6123H planed amp will be a 2A3 or EL34? but I will probity want to try different amps/valves reason for thinking the James 6123H allowing 2.5/3.5/5K flexibility I see that one sellers spec is for pri DC120mA an other is 90mA what is the true pri DC current? On this TX
Can anyone add to the list of some other big valves
Valves list
2A3 300B/6V6
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#65

Post by Will »

2A3 @ 60ma use a triode as a triode :wink:
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andrew Ivimey
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#66

Post by andrew Ivimey »

:D :D erm, I suppose you could use a 2A3 as a diode but otherwise isn't one's choice rather limited? :D :D

sorry Will, I couldn't resist that. Call me childish etc etc but ...

Mr Hepburn - with all the alternative windings and the various cheats you can do by gently forcing the secondaries the make the primary windings have different impedances, that particular output pair could cope in SE with almost any valve. I'd stop at an 845 at around 500volts but really, 'pick a valve, any valve!'

Just right now I have been enjoying the sound of ultra linear but I am not going to get that out of a triode!

And I would guess that everyone here would agree that at the end of the day all other things being equal or at least taken into account, the triode is the best type of valve around, DHT the ultimate.

So use a KT88 if you wish, or use a 45, EL84 or CV'obscure' (oooo oxymoron!) triode them if you need and these transformers will do the job.
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colin.hepburn
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#67

Post by colin.hepburn »

most valves thats good
The 6123H spec is unclear is it a 120mA 20watts or 90mA 20watts must be a typo error on the sellers site anyone got the spec sheet to check it out
Thanks
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#68

Post by Nick »

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colin.hepburn
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#69

Post by colin.hepburn »

thanks Nick
well two sellers of the 6123H say that its DC current is 120mA but the James website states 90mA ? :?
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#70

Post by Nick »

Which website is that Colin?
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#71

Post by Darren »

Hi Colin,

Not sure if this is any help, I have a pair of

JS-6157H

140mA

5K/7K

50W

20Hz-54KHz-2dB

211 / 845

C

5.6

They are rated at 50W. I have pushed them to around 70W at 180ma and found no ill effects. They could prop go higher but I don't as yet know how high.

Edit: Come to think of it they did spend a while (days) at 200ma each and I didn't notice anything untoward and they have been fine since.
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#72

Post by Will »

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#73

Post by pre65 »

Sandys site says the ones Darren offered are 90ma as well !
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#74

Post by Darren »

I wasn't offering them ?

Keep ya bloody hands off !!! :D

I wouldn't part with them as I find them to be excellent.
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#75

Post by colin.hepburn »

Nick wrote:Which website is that Colin?
Hi Nick
this one i took it to be the authentic website could be wrong thou...
http://jianshin.myweb.hinet.net/OUTPUT_S.E.htm
i figured the 6123H would be my best bet for flexibility and cost although I'm drawn to a 2a3 amp i as sayed will want to try other valves i.e EL34 KT88 plus others so am confused about whether the TX is 120 or 90mA and able to handle the heftier valves :shock: has anyone got the 6123H so we can check this for sure
Cheers
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