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B&K ST-140 (Repair or Parts)
B&K ST-140 (Repair or Parts)
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Old 19th September 2018, 07:18 PM   #1
vdi_nenna is offline vdi_nenna  United States
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Default B&K ST-140 (Repair or Parts)

SOLD

For sale is a non-functional B&K ST-140 power amp. Tried new Exicon lateral mosfets, but still didn't work. Was brought up with a variac, but bias was all over the place. No burning or shorts. I gave up and put it back in the box.

I do not have a schematic. What's available on the web is not correct.

Have original box. Will include original SK and SJ mosfets

The package weights 28 lbs or 12 kg.
Measures 23x20x10 inches or 584.2 x 508 x 254mm

My zip code is 19087.

Asking $60 + paypal and shipping.

SOLD

Thanks for looking,

Vince
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Last edited by vdi_nenna; 7th October 2018 at 01:10 PM. Reason: More info
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Old 19th September 2018, 08:11 PM   #2
RM is offline RM  Norway
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Can you possibly take some pictures with the top cover off?

Regards
R
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Old 19th September 2018, 08:12 PM   #3
vdi_nenna is offline vdi_nenna  United States
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I can.
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Old 19th September 2018, 08:42 PM   #4
vdi_nenna is offline vdi_nenna  United States
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Some pic from phone when I was trying to fix it. Can take more pics, if needed.

The only pot for adjustment is on the trace of the PCB for offset.
Was told the bias is auto set. Unfortunately that's a bad picture.
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File Type: jpg 20170709_165826_resized.jpg (814.6 KB, 273 views)
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File Type: jpg 20170710_073101_resized.jpg (828.1 KB, 115 views)
File Type: jpg 20170710_073113_resized.jpg (859.1 KB, 122 views)
File Type: jpg 20170710_073127_resized.jpg (556.9 KB, 104 views)
File Type: jpg 20170710_073142_resized.jpg (840.9 KB, 100 views)
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Last edited by vdi_nenna; 19th September 2018 at 08:49 PM.
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Old 20th September 2018, 10:21 AM   #5
RM is offline RM  Norway
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Thanks for the pictures. Could you please get a quote for shipping it to Norway? Also, in the interest of low weight/lower shipping cost you can lose the power transformer. It`s probably only 120VAC. Maybe it can be donated to someone in need of it?

R
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Old 20th September 2018, 08:41 PM   #6
Meerkat 70 is offline Meerkat 70  Canada
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Default B & K St140

I might be interested in this,, Can you give me the boxed weight as I have access to shipping from here in Ontario, Canada.. Thanks.. Also need to know your zip code so I can get estimate.. Only after your acceptance and money transfer will I ask for address to ship from in PA. Cheers Wayne
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Old 20th September 2018, 09:43 PM   #7
vdi_nenna is offline vdi_nenna  United States
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Hi Meerkat 70,

RM is interested, so I will let you know if it becomes available.

Also, someone pointed me to the schematic, which I can also include now.

thanks,

Vince
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Old 25th September 2018, 03:06 PM   #8
vdi_nenna is offline vdi_nenna  United States
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B&K ST-140 still available.

The package weights 28 lbs or 12 kg.
Measures 23x20x10 inches or 584.2 x 508 x 254mm

My zip code is 19087.
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Old 25th September 2018, 04:24 PM   #9
Meerkat 70 is offline Meerkat 70  Canada
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Thanks Vince.. Just waiting for the shipping quote from my source.. Hopefully it will be low enough to make the deal work. If in the interim if you get another offer please just let me know if you want to move on it. I do not have a problem with that.. I will contact my shipping source today and find out what the delay is.. Cheers Wayne
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Old 26th September 2018, 04:55 PM   #10
vdi_nenna is offline vdi_nenna  United States
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Still available as of Sept 26 2018, 12 pm.
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