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

What people are working on at the moment
Max N
Old Hand
Posts: 1000
Joined: Thu Aug 16, 2007 6:10 pm

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

Post by Max N » Mon May 08, 2017 1:10 pm

Dohhhhh!!!!!!!
Thanks Nick

RhythMick
User
Posts: 128
Joined: Fri Jun 23, 2017 12:24 pm

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

Post by RhythMick » Sun Mar 04, 2018 12:34 am

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)

User avatar
IslandPink
Thermionic Monk Status
Posts: 5917
Joined: Tue May 29, 2007 7:01 pm
Location: Denbigh, N.Wales

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

Post by IslandPink » Sun Mar 04, 2018 12:32 pm

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.
White flags of winter chimneys waving truce against the moon ( Mitchell )

User avatar
Nick
Site Admin
Posts: 11200
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

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

Post by Nick » Sun Mar 04, 2018 12:39 pm

I have dropped him a email.
Resistance isn't futile it's V / I.

User avatar
Ray P
Shed dweller
Posts: 2247
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

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

Post by Ray P » Sun Mar 04, 2018 5:19 pm

I've been in contact with Andrew about obtaining some additional PCBs too.

RhythMick
User
Posts: 128
Joined: Fri Jun 23, 2017 12:24 pm

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

Post by RhythMick » Sun Mar 04, 2018 6:04 pm

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
Eternally single
Posts: 4051
Joined: Thu May 24, 2007 2:18 pm

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

Post by Andrew » Mon Mar 05, 2018 8:02 pm

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

Andrew
Eternally single
Posts: 4051
Joined: Thu May 24, 2007 2:18 pm

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

Post by Andrew » Tue Mar 06, 2018 6:54 pm

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
User
Posts: 128
Joined: Fri Jun 23, 2017 12:24 pm

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

Post by RhythMick » Tue Mar 06, 2018 7:37 pm

Thanks Andrew. You have my PM. Let me know when you want payment.

Andrew
Eternally single
Posts: 4051
Joined: Thu May 24, 2007 2:18 pm

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

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

RhythMick
User
Posts: 128
Joined: Fri Jun 23, 2017 12:24 pm

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

Post by RhythMick » Wed Mar 14, 2018 5:46 pm

Thanks Andrew. Building my prototype with parallel AC heaters and looking forward to replacing them.

RhythMick
User
Posts: 128
Joined: Fri Jun 23, 2017 12:24 pm

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

Post by RhythMick » 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.

User avatar
Ray P
Shed dweller
Posts: 2247
Joined: Thu Nov 22, 2007 5:18 pm
Location: Somerset

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

Post by Ray P » Thu Mar 15, 2018 6:36 am

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.

Andrew
Eternally single
Posts: 4051
Joined: Thu May 24, 2007 2:18 pm

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

Post by Andrew » Thu Mar 15, 2018 10:48 am

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.

viewtopic.php?f=19&t=5500

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

Andrew
Eternally single
Posts: 4051
Joined: Thu May 24, 2007 2:18 pm

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

Post by Andrew » Thu Mar 15, 2018 8:07 pm

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.

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests