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

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

Post by Nick »

Max N wrote: Fri Mar 31, 2017 1:05 pm Hi Andrew
Do you have any of the DHT PCBs or kits left?
Ideally I'd like 4 off for 45s, 4 off for 300Bs, and 4 off for 211s

While I'm at it, do you have any of the IDHT heater boards or kits left?

Cheers

Max
We are working on a new version of the reg boards, so if he doesn't now, he should soon.
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#827 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

simon wrote: Fri Mar 31, 2017 1:08 pm Sounds like quite an amp Max! Please tell us it's a balanced 45-300B-211 amp :-)
:lol:
Not quite - 2 unfinished projects:
Something - 45 -300B
and
Something - 45 - 211
I've decided to revisit both, but this time with more emphasis on the power supply side, including heaters.
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#828 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

Nick wrote: Fri Mar 31, 2017 1:21 pm
Max N wrote: Fri Mar 31, 2017 1:05 pm Hi Andrew
Do you have any of the DHT PCBs or kits left?
Ideally I'd like 4 off for 45s, 4 off for 300Bs, and 4 off for 211s

While I'm at it, do you have any of the IDHT heater boards or kits left?

Cheers

Max
We are working on a new version of the reg boards, so if he doesn't now, he should soon.
OK, thanks Nick. Is there a thread for the new boards?
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#829 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Nick »

Not at the moment, the plan is to sell them on ebay, but I am sure we will have something for beta testers :-)
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#830 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by simon »

Max N wrote: Fri Mar 31, 2017 7:12 pm :lol:
Not quite - 2 unfinished projects:
Something - 45 -300B
and
Something - 45 - 211
I've decided to revisit both, but this time with more emphasis on the power supply side, including heaters.
Shame! I use 26-10Y-300B, but there's so many valves and so little time.
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#831 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

Wow, I've just read through this whole thread. What a huge amount of work by Andrew, Mark, Nick and everyone else!
Very happy to be a beta tester for the new boards if that would help. Or pay the Ebay price. Whatever works best :-)
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#832 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

I have some boards left Max, but nothing that can handle a 211, you need to wait for the new boards Nick's mentioned for those really big triodes.
The new boards are all about cooler running, more power efficiency etc; in electrical terms there's no reason to believe they won't sound the same as they old ones. The aim is to replicate the sound but reduce the heat generated, its not excessive for 300B but when you get to GM70 and 211 its just not a practical proposition.

So....you won't loose out by getting a couple of the existing boards, if you want to press on with your projects rather the wait?

cheers,

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

Post by Andrew »

Hi Max,

Let me have a dig, the 211 will need to wait for the new version but I should have some bits left for the 45, 300B and indirect valves.

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

Post by pre65 »

My GK71 type (same as GM70) are still working fine. :D
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#835 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

Andrew wrote: Sun Apr 02, 2017 8:17 pm Hi Max,

Let me have a dig, the 211 will need to wait for the new version but I should have some bits left for the 45, 300B and indirect valves.

Andrew
OK, thanks Andrew, :)
I'll use the existing version for breadboarding/prototyping, then probably switch to the newer version if/when I get to the stage of putting things into nice boxes. Or if you want me to do any comparisons between the old and new versions.
Last edited by Max N on Mon Apr 03, 2017 8:04 am, edited 1 time in total.
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#836 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

pre65 wrote: Sun Apr 02, 2017 8:18 pm My GK71 type (same as GM70) are still working fine. :D
Cheers Phil, that's good to know, but I'll take Andrews advice and wait for the new boards for the 211. :)
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#837 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew »

Max, I've had a rummage. Ok, so you could use the small or big board, depends if want heatsink on pcb or connect heatsink to an external case. Electrically they are the same, save the heat sink and two more smoothing caps on the heatsink to case version, really done for 2A3.

I'm getting low now, but should have enough of each, just let me know.

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

Post by Max N »

Hi Andrew
I you have them, I'd like 8 of the DHT boards (4 for 45, 4 for 300B) and 8 of the IDHT boards
I'd prefer kits if you have them but happy to take just the PCBs
Shall I pm you?
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#839 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Max N »

Hi Andrew
I have replied to your latest pm, but for some reason my pm is sitting in my outbox and not showing as sent.
In answer to your last question, yes please post whenever suits you. :)
Cheers
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#840 Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Nick »

I have replied to your latest pm, but for some reason my pm is sitting in my outbox and not showing as sent.
It does that until its read by the recipient.
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