I guess because he lives in Italy and shipping from the USA was too expensive.edman44 wrote: I was wondering why you chose to have your transformer made in Italy cost of shipping? Thinking I would like a trio for mine if they are better for the amp? lol.
+4
Tom Pickett
peterh
markeby
jonny6336
8 posters
New construction st120
mijohn- Posts : 119
Join date : 2013-06-19
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jwb474- Posts : 74
Join date : 2014-07-13
Age : 71
Location : Wolfforth, Tx
I also like the auto-bias setup. The auto-bias assembly can be bought from Eahard Audio: https://www.erhard-audio.com/AB-Q-ST70-ST120.html.
A couple of recommendations for using the auto-bias. I would conformal coat both sides of the pwb with Humid-Seal or some other brand. While the circuit spacings are theoretically OK for the voltages, as time goes by and dust accumulates amid humid conditions there is a danger of a flash over especially if the HIV input option is used. Also install the cathode fuse/varistor mod.
A couple of recommendations for using the auto-bias. I would conformal coat both sides of the pwb with Humid-Seal or some other brand. While the circuit spacings are theoretically OK for the voltages, as time goes by and dust accumulates amid humid conditions there is a danger of a flash over especially if the HIV input option is used. Also install the cathode fuse/varistor mod.
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jonny6336- Posts : 29
Join date : 2018-01-31
Age : 46
Location : Italy
mijohn wrote:I guess because he lives in Italy and shipping from the USA was too expensive.edman44 wrote: I was wondering why you chose to have your transformer made in Italy cost of shipping? Thinking I would like a trio for mine if they are better for the amp? lol.
exactly
jonny6336- Posts : 29
Join date : 2018-01-31
Age : 46
Location : Italy
hello everyone, after some time, I finally ordered the transformers to complete my realization. I chose the hammond model 1650NA, have any of you ever tried them under your creations?
jonny6336- Posts : 29
Join date : 2018-01-31
Age : 46
Location : Italy
transformers arrived and positioned, they are really huge and well cared for in construction. I can't wait to listen to you
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jonny6336- Posts : 29
Join date : 2018-01-31
Age : 46
Location : Italy
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jonny6336- Posts : 29
Join date : 2018-01-31
Age : 46
Location : Italy
turned on and made the first tests
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Roy Mottram- Admin
- Posts : 1837
Join date : 2008-11-30
BTW, that's an illegal copy of the VTA circuit board, let me know where you got it so I can sue them for $100K
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