DHT Heater using VCCS - PCB or Kit (Possible Group buy)

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Max N
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#841 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

Dohhhhh!!!!!!!
Thanks Nick
RhythMick
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#842 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick »

Well that was a fun read, all 57 pages. Thanks to Andrew and Mark for what looks like a lot of work.

Are these boards still available? If so I'd like...

4 x 26 (1.5v @ 1.05A)
4 x 71A (5v @ 0.25A)
4 x 45 (2.5v @ 1.5A)
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IslandPink
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#843 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by IslandPink »

RhythMick wrote: Sun Mar 04, 2018 12:34 am Well that was a fun read, all 57 pages.
Respect Due ! :notworthy:
I think the smaller boards will go up to 1.5A so those might all be the same. You set the voltage yourself.
If Andrew doesn't come back to you in the next day, I'll dig out his email for you.
"Once you find out ... the Circumstances ; then you can go out"
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Nick
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#844 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Nick »

I have dropped him a email.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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Ray P
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#845 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Ray P »

I've been in contact with Andrew about obtaining some additional PCBs too.
Sorry, I couldn't resist!
RhythMick
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#846 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick »

If the PCB are no longer available I'm happy to mount on epoxy board and wire point to point. Is the circuit available, with a component list? I recognise a lot of time and effort went into this, happy to make a financial contribution.
Andrew
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#847 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

Sorry everyone, been busy.

I am putting together an order for more PCB right now, it's good to know these PCB are being used.

Please let me know if you'd like integral heatsink or heatsink externally mounted?

The externally mounted heatsinks board's support two more input caps so they can handle higher incoming current, they will require bolting to something that can dissipate sufficient heat depending upon the valve; there no other differences, same circuit, same parts.

For 300B you have the option of either type of PCB.

Drop me a PM.

Andrew
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Andrew
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#848 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

I got chance to look at what PCB's I had left, looks like I need to order up both sizes.

Just so everyone knows, it will be a couple of weeks before they arrive.

best regards,

Andrew
Analogue, the lost world that lies between 0 and 1.
RhythMick
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#849 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick »

Thanks Andrew. You have my PM. Let me know when you want payment.
Andrew
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#850 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

Over the last few days I have been making some improvements to the PCB screen printing to make them easier to solder up, the orders are being processed and reviewed as I type this.

Andrew
Analogue, the lost world that lies between 0 and 1.
RhythMick
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#851 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick »

Thanks Andrew. Building my prototype with parallel AC heaters and looking forward to replacing them.
RhythMick
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#852 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick »

Could anyone attach a pic and measurements of a finished board with sizings please (W x D x H) including heatsinks. Working out what space I need to accommodate these in my new amp.
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Ray P
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#853 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Ray P »

Andrew wrote: Wed Mar 14, 2018 5:36 pm Over the last few days I have been making some improvements to the PCB screen printing to make them easier to solder up, the orders are being processed and reviewed as I type this.

Andrew
Thanks Andrew. Let me know when you need paying.
Sorry, I couldn't resist!
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#854 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

RhythMick wrote: Wed Mar 14, 2018 9:07 pm Could anyone attach a pic and measurements of a finished board with sizings please (W x D x H) including heatsinks. Working out what space I need to accommodate these in my new amp.
Done.

http://www.audio-talk.co.uk/phpBB3/view ... =19&t=5500

Andrew
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#855 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

Just to gauge numbers, I have.

RhythMick 4 Small
Neal 4 Large
Michael L 2 Small kits + 2 bare PCB
Ray 4 kit or bare PCB?

Andrew
Analogue, the lost world that lies between 0 and 1.
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