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K8011/K8010 PCB build thread
K8011/K8010 PCB build thread
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Old 18th August 2014, 06:26 PM   #11
jamesfeline is offline jamesfeline  United Kingdom
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Hi
Ebay link for 2 new PCB's

valve amplifier PCB Velleman K8011 | eBay
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Old 18th August 2014, 09:03 PM   #12
jamesfeline is offline jamesfeline  United Kingdom
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Hi

Please describe the fault in more detail as I can repair these units for you .. regards Nick
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Old 19th August 2014, 11:20 AM   #13
jamesfeline is offline jamesfeline  United Kingdom
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Hi

Nick Again .. I have had a few requests if I could offer a full kit for k8010 & k8011 mono block amplifiers.

I have been thinking about a small business venture but the transformers would make the kits very expensive, or I could offer a small form factor kit without valves and the transformers

what do you all think ??

regards

Nick
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Old 19th August 2014, 02:14 PM   #14
wicked1 is offline wicked1  United States
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Hi,
I'd think a full kit would mean less experienced builders and more questions.

Partial kit (no tubes or transformers) is good for slightly more advanced builders, and maybe more sales, as it's not such a big up-front expense for people.

Personally, I'd set up a simple website w/ some basic info and parts list w/ part numbers from a couple of electronics distributors, and just sell the PCB's. Then the builder can simply order the parts list for an easy build, or choose different components if they want.
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Old 19th August 2014, 06:07 PM   #15
jamesfeline is offline jamesfeline  United Kingdom
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Hi

Excellent advice .. what I was thinking .. or a fully built unit fully tested and guaranteed

thanks for the help

Nick
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Old 23rd August 2014, 09:37 AM   #16
jamesfeline is offline jamesfeline  United Kingdom
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Hi All

For all those people that have pm,d me I will upload some more photos tonight, hopefully have the new PCB running this weekend

90w RMS (class A up to 15 w)

regards

Nick
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Old 7th September 2014, 12:09 PM   #17
jamesfeline is offline jamesfeline  United Kingdom
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Hi

Some more pics as the 1st PCB has now been fully populated, next stage is to add to the main chassis plate and connect all the switches and transformers. Also note I have mounted the 10 ohm cathode resistors off board for easy change out in case a valve pops .. which normally takes out the resistor. These are sized for 1w only as a safety feature, so they go open circuit as not to cause any more pcb track damage.

regards

Nick
Attached Images
File Type: jpg k8011 pics 007.jpg (647.8 KB, 353 views)
File Type: jpg k8011 pics 008.jpg (648.1 KB, 340 views)
File Type: jpg k8011 pics 009.jpg (649.0 KB, 321 views)
File Type: jpg k8011 pics 010.jpg (672.5 KB, 320 views)
File Type: jpg k8011 pics 011.jpg (683.7 KB, 306 views)
File Type: jpg k8011 pics 012.jpg (661.1 KB, 136 views)
File Type: jpg k8011 pics 013.jpg (661.2 KB, 143 views)
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Old 7th September 2014, 09:23 PM   #18
jamesfeline is offline jamesfeline  United Kingdom
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Hi

No one interested in my work .. oh well
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Old 8th September 2014, 07:34 AM   #19
samb is offline samb  France
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nick
wonderfull work
the PCB is populated as an art work
I notice that you have increased the value of HT capacitors.
But to be very efficient we should introduce a couple of resistors between
the capacitors an as the PSB is done it is impossible.
How long have you been involved in DIY to do things so neat?
Congratulations
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Old 8th September 2014, 09:54 AM   #20
jamesfeline is offline jamesfeline  United Kingdom
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Hi

Thanks for the comments, have been making electronic projects since the age of 15 .. I am 50 next April

There is a small power resistor used a 5w 1 ohm at the output of the power supply

thanks for the comments

Nick
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