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Old 19th August 2012, 10:20 AM   #1461
Junie is offline Junie  Philippines
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Thanks Andy.
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Old 19th August 2012, 10:24 AM   #1462
AndrewT is offline AndrewT  Scotland
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I'm not Andy, never have been.
I am known on this website as AndrewT.
That could be shortened to save typing to A or An or And or at a stretch AT, but never Andy.

I do not approve of using real names in lieu of the Membership name shown with each post.
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Old 19th August 2012, 10:31 AM   #1463
Junie is offline Junie  Philippines
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Noted AndrewT.
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Old 20th August 2012, 11:07 AM   #1464
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AndrewT, as he is known has been around here for a long time and always helpful with accurate information. Though he is very stern on exactness. I wish more of the old timers were still active to participate as he.

Thanks for the comment on the board quality. I had always hoped when they were ordered that they would turn out only half as good. Many people were involved in this and I thank them all. I would like to know just how many boards made it into a workable amplifier. I have a few up and running and am quite pleased. I have not been so fortunate with the twelve output boards.
Now, just to finish my tube project. GU-50 160 watt push pull. Should be very nice when or if ever finished.

Tad\

ps, Just a note. If enough people were interested I would run another group buy for this amp. Need at least one hundred boards to order.
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Old 20th August 2012, 11:17 AM   #1465
Luke is offline Luke  New Zealand
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Hi Tad,

long time no see. From memory you were pretty good with these Leach clones. What happened with your 12 output board?
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Old 20th August 2012, 11:27 AM   #1466
AJT is offline AJT  Philippines
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Quote:
Originally Posted by tryonziess View Post
AndrewT, as he is known has been around here for a long time and always helpful with accurate information. Though he is very stern on exactness. I wish more of the old timers were still active to participate as he.

Thanks for the comment on the board quality. I had always hoped when they were ordered that they would turn out only half as good. Many people were involved in this and I thank them all. I would like to know just how many boards made it into a workable amplifier. I have a few up and running and am quite pleased. I have not been so fortunate with the twelve output boards.
Now, just to finish my tube project. GU-50 160 watt push pull. Should be very nice when or if ever finished.

Tad\

ps, Just a note. If enough people were interested I would run another group buy for this amp. Need at least one hundred boards to order.
Tad, what happened to your 12 trannie board? did you finish that but has issues or what? i remember your 5pair board worked the first time right?
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Old 20th August 2012, 12:04 PM   #1467
Junie is offline Junie  Philippines
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Default On to my build

Hi Tad,

Thanks, I already populate the boards with the parts i had from my previous projects. I can see the solidness of the boards, the thickness which is 2.4mm is really a fantastic idea and the holes to secure the boards firmly is an added advantage to free from stress and vibrations.
I can use 2SC5200 and 2SA1943 for the output stage but what is the disadvantage compared to the recommended transistors by Jens?

With best regards,
Junie
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Old 20th August 2012, 12:36 PM   #1468
AndrewT is offline AndrewT  Scotland
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1943/5200 could be fakes.
1943/5200 have terrible HV SOA compared to similar BJTs.
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Old 20th August 2012, 01:58 PM   #1469
Junie is offline Junie  Philippines
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Quote:
Originally Posted by AndrewT View Post
1943/5200 could be fakes.
1943/5200 have terrible HV SOA compared to similar BJTs.
AndrewT let me know if these are fake, A shop has 2 boxes with Toshiba label in it and with a white blister pack where those trannies help up inside in a group of 10 if i remembered correctly.
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Old 20th August 2012, 04:01 PM   #1470
a.wayne is offline a.wayne  United States
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Hello Junie ,

An leach amp too , interesting Shootout of all your amps are due sir, you can pm me your thoughts when done ..

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