Ok folks, in honor of the man himself, Mr. Nelson Pass, I am offering this space heater for free - all you have to do is be a bona fide fan of The One and Only, and come pick it up locally in Vancouver as this thing weighs around 100lbs.
So what do we have here, well this is a decommissioned & repurposed VFD with a very high quality tubular fan added to push air through some truly enormous heat sinks. I won't hazard a guess at exactly how much power you could push through this and still keep the gain stages at comfortable temperatures but I bet it is a lot. The top layer of this beast is the CLC power supply full of big caps, inductors, bridge rectifier diodes (some fancy soft recovery ones if I recall correctly) and a monster toroidal transformer. At a guess there is probably $1,000 or more in parts here before we figure out the heatsinks.
This would be a great winter space heater for one of Nelson's Class A designs - Nelson you brought me a lot of joy over the years - this is my way of saying thank you.
Tell us why you deserve this and it's all yours.
Cheers
So what do we have here, well this is a decommissioned & repurposed VFD with a very high quality tubular fan added to push air through some truly enormous heat sinks. I won't hazard a guess at exactly how much power you could push through this and still keep the gain stages at comfortable temperatures but I bet it is a lot. The top layer of this beast is the CLC power supply full of big caps, inductors, bridge rectifier diodes (some fancy soft recovery ones if I recall correctly) and a monster toroidal transformer. At a guess there is probably $1,000 or more in parts here before we figure out the heatsinks.
This would be a great winter space heater for one of Nelson's Class A designs - Nelson you brought me a lot of joy over the years - this is my way of saying thank you.
Tell us why you deserve this and it's all yours.
Cheers
Attachments
Har! Yes it is very fugly. Perfect workshop amp for someone who lives in a cold climate.
Fair play sir and thank you. Hoping there is a Pass fan here in Van somewhere...
If not, and you are looking to move it, I will be gracious enough to come get it. It may not get a lot of use here so I am hoping you can find someone to give it a loving home. What part of town are you in?
Been using VFD in industrial applications for years, as motor control drives. What makes one applicable as an amplifier for high fidelity?
BillWojo
BillWojo
Cal, if you end up with it and find no use you can give it to me.
I have be come a Pass fan. SIT-3, 6 ACA channels, ACAmini. I’d like more.
And a space heater would be appreciate dthis time of year.
dave
I have be come a Pass fan. SIT-3, 6 ACA channels, ACAmini. I’d like more.
And a space heater would be appreciate dthis time of year.
dave
Just the chassis and the heatsinks was re-used Bill, the rest was stripped and all new components put in (well the caps were surplus but the rest was bought new for the project). As you likely know new VFD's are tiny in comparison and have small heatsinks being much more efficient. This one was from the days of old where heatsinks were huge!
Dave looks like you are on the island and Cal is in the lower mainland. Both of you support this site and the mission of spreading DIY Audio goodness so both worthy. Let me know what works. Cheers
Let’s give it another few days In case there is someone. If you need it moved sooner I am about 30 minutes from you Keenlyside and am rather flexible about time. Please send me a PM aka Conversation and we can set it up.