Yes, I am also interested in the PSRR value considering fact of (proposed) usage of unregulated and/or switching PSU.
If you're Jari then yes.
It sounds amazing, I'll do first 50 hours here then send it back to Sweden.
If you're Jari then yes.
It sounds amazing, I'll do first 50 hours here then send it back to Sweden.
Yes its me👍
Cant wait to get back and try out the new 1.4😃
AAVID Thermalloy for First One v1.4
Another v1.4 upgrade takes place today, customer requested Naim's approach with 2 mm Al-Oxide thermalloy insulators. Now 2 mm extra distance means serious drop of capacitance to chassis. We'll hear the results over the weekend.
Offers started today, expect an e-mail.
Another v1.4 upgrade takes place today, customer requested Naim's approach with 2 mm Al-Oxide thermalloy insulators. Now 2 mm extra distance means serious drop of capacitance to chassis. We'll hear the results over the weekend.
Offers started today, expect an e-mail.
Attachments
Nice.
If they are OK maybe they can be included in the package (price adjusted) to avoid us, lazy costumers of Lazy Cat, the annoying sourcing...
Dear LC, remind us also the diameter of the fixing bolts: are they M3 o M4?
Thank you very much,
M.
PS: the surface seems a little smaller than that of the FET...
If they are OK maybe they can be included in the package (price adjusted) to avoid us, lazy costumers of Lazy Cat, the annoying sourcing...
Dear LC, remind us also the diameter of the fixing bolts: are they M3 o M4?
Thank you very much,
M.
PS: the surface seems a little smaller than that of the FET...
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We'll taste the difference first, if any, and report back. Indeed insulators 2,5 mm shorter than the mosfet case but the width is perfectly aligned, also metal plate is covered in full, so no significant thermal transfer reduction expected.
There were always M3 fixation bolts used with First One modules, also as many times highlighted v1.4 is direct replacement for v1.2, same dimensions in full.
L.C.
There were always M3 fixation bolts used with First One modules, also as many times highlighted v1.4 is direct replacement for v1.2, same dimensions in full.
L.C.
Another v1.4 upgrade takes place today, customer requested Naim's approach with 2 mm Al-Oxide thermalloy insulators. Now 2 mm extra distance means serious drop of capacitance to chassis. We'll hear the results over the weekend.
Offers started today, expect an e-mail.
~I always use those for all my amps
With such spacing grounding of the heatsink may no longer be compulsory... should be interesting to know what are the sonic results.
Heatsinks and the rest of the chassis were not grounded even before, only RF decoupling, otherwise complete galvanic isolation from chassis to module. The chassis is of course mandatory earthed, otherwise GND lift was always in use with my First One amps.
In this case, using 2 mm ceramic insulators, output to chassis capacitance droped to less than 1/20th which is noticable in extreme hight's details, with remark on extreme, probably not revealed in all systems. Heat transfer is good, according to specs even better than a thin mica, which is remarkingly surprising to me, in practice amp shows no output's overheating or strange bias behaviour. Definitely highly recommended to use.
I suppose your Heatsinks are mechanically screwed to the chassis, so connected in common ground with the chassi's ground, no ?
All parts of the chassis are on the same potential and that is earth potential - mandatory for metal chassis. GND from both SMPS-s are in complete isolation from chassis - GND lift in use, as known from PA. This gives best sonic results and the amp's channels acts as real dual mono as they were in separate chassis.