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PCB for the HAWK A18 amplifier (+ FETs if required)

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ixix

Member
Joined 2011
Hi Marcel.

This morning I received a white envelope with the PCBs.
Is it possible that it is the first shipment? I think it's very fast if it's the shipment you made earlier this week ...
If I receive the "lost" shipment, I can return that PCB set to you.
Be aware, I will notify you if I receive the other shipment.

Best,
Francisco
 
Tarasque

Tarasque

Member
Joined 2002
Hawk A18 in operation

This is one of the 2 amplifiers with 4 channels A18. The performance is stunning!
 

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jean-paul

jean-paul

Disabled Account
Joined 2002
Here a picture as I could not attach a picture via PM. They are 185 x 230 mm. I don't count the part without fins as I would cut that off. Fins are 40 mm. Material is cast aluminium. I have a few of these left. The work is to cut the part without fins off and then cut them in the middle leaving 6 hopefully :) rightly sized heatsinks. Hint: AFAIK you never published size of the boards...
 

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Tarasque

Tarasque

Member
Joined 2002
:cool::cool:The boardsize is 80x87 mm.

Sorry to say that these sinks do not do the job for me. The solution on the photo was a to bridge the gap to the delivery of the 2 pieces of heatsink that were due. They are 220x85mm and 3meters in length.
Im confident that that supply will tast for the comming years......:cool::cool::cool::D
 
Tarasque

Tarasque

Member
Joined 2002
That is acting as heatsink.....With the new heatsinks I can increase the Iq to 1,2 Amp at 28V supply. total dissipation then will be 240W (120W per side) with 150mm high sinks.
Sink temp will then be around ambient + 23C

Tested the sinks with 120mm length but that was not sufficient at +28C
 
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