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Sold Bob latino built dynaco st70

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skite30

Sold Bob latino built dynaco st70
« on: 1 Jul 2017, 08:07 pm »
This was built by bob and includes the 12au7 upgrades and russian PIO caps.   In great condition.  Comes with gold lion kt-66's.  Individually biased and can use el34, kt77, kt88's.  Can use 6550's with a reesistor change. 
Great sounding amp.  1,400 new.  Asking 700 plus shipping from 32080.









« Last Edit: 7 Jul 2017, 02:02 pm by skite30 »
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WireNut

Re: Bob latino built dynaco st70
« Reply #1 on: 1 Jul 2017, 08:47 pm »
Very Nice  :drool:
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restrav

Re: Bob latino built dynaco st70
« Reply #2 on: 1 Jul 2017, 08:51 pm »
what is the power output with the KT66?
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REDBEAN

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Re: Bob latino built dynaco st70
« Reply #3 on: 1 Jul 2017, 09:08 pm »
Is that a volume control knob on the front of the amp?
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skite30

Re: Bob latino built dynaco st70
« Reply #4 on: 1 Jul 2017, 11:52 pm »
Poser output with the kt-66 is about 35 per channel in ultralinear mode and 20 in single ended. It can swith between the two modes on the fly with just a slight pop.  That is a volume control.  It is passive with 1 input so it can be used as an integrated. A very versatile and really good sounding amp.  For the money it is great value. 
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skite30

Re: Bob latino built dynaco st70
« Reply #5 on: 2 Jul 2017, 12:49 am »
Yes triode.  R two toggle switches in front of the transformers that allow u to switch between the two. I have the assembly manual. Bob increased the size of the original st70 transformers.  It uses 12au7 tunes instead of the 7199's.  i have Been using 12bh7a's in it.   
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skite30

Re: Bob latino built dynaco st70
« Reply #6 on: 2 Jul 2017, 12:51 am »
Sorry it is not a triode it is a pentode tube obviously, wired in single ended mode.
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restrav

Re: Bob latino built dynaco st70
« Reply #7 on: 2 Jul 2017, 01:20 am »
do you have the tube cage?
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skite30

Re: Bob latino built dynaco st70
« Reply #8 on: 2 Jul 2017, 04:12 am »
It never had a tube cage.  I guess one of the old st70 ones might fit.  This is not a rebuilt st70. It is an all new amp based on the st 70.   U can go to the tubes4hifi.com website to read all about this amp. 
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Bostown

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Re: Bob latino built dynaco st70
« Reply #9 on: 2 Jul 2017, 02:26 pm »
Yes, a Dynaco ST70 Cage will fit. I'm using on my Latino VTA ST70.

  hell, $1000- $900 is a deal.    $700 ? this should have been gone within seconds of being listed :)

Not sure why there needs to be any changes to use 6550's vs any of the other tubes mentioned.
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skite30

Re: Bob latino built dynaco st70
« Reply #10 on: 2 Jul 2017, 05:38 pm »
When I put the 6550's in I was unable to bias them down in the operating range. Bob said it would probably a resistor change to get them to bias right. I didnt do it. I dnt know if running them a bit hot would damage the amp or just shorten tube life. So that leaves me with a matched quad of new issue tung sol 6550's if anyone is interested.
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skite30

Re: Bob latino built dynaco st70
« Reply #11 on: 5 Jul 2017, 10:07 pm »
SOLD
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Bostown

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Re: Bob latino built dynaco st70
« Reply #12 on: 6 Jul 2017, 08:04 pm »
Quote from: skite30 on  5 Jul 2017, 10:07 pm
SOLD

I have a strong feeling that another one will be offered...
Friendly FYI.. change the first word in your Subject to SOLD!
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