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across the bench [season-2] the electron strikes back

denon amp hs2 - 13.jpg
bottom of the chassis minus the plastic shell

denon amp hs2 - 14.jpg
it is also a very large thermal mass heat sink, thick chunk of metal
 
denon amp hs2 - 15.jpg
closer look at heat sink assembly

denon amp hs2 - 16.jpg
definitely lots of metal here, who knows what percentage of the systems overall weight is the heat sink.
 
and in other news, as 28-jun is almost over in this timezone...

melvin kaminsky joins the triple digit club


plus actively working with rick moranis on spaceballs 2: the new one


*i probably shouldnt be doing stuff like this on an audio/electronics themed thread but audio/video entertainment industry is still related to hifi.

either way a day of celebration for an influential entertainment industry veteran, back in the saddle even if its not blazing. cheers to melvin.
 
jolida 302 - 1.jpeg
quick thermal cameo of the jolida integrated amp from the past, EL34 installed instead of 6550 outputs.

jolida 302 - 2.jpeg
quality control performance check before it goes out into the world. such a healthy glow.
 
not sure I like that drop chassis thing on the Atlas. Seems like it would be difficult to get tubes out of it. Also the output tubes can't be pulled from the bases. I've had tubes lose that adhesive between the bottle and base, not great to yank such tubes by the glass. I guess you can pull the top but doing that just to pull a tube seems inconvenient.
 
not sure I like that drop chassis thing on the Atlas. Seems like it would be difficult to get tubes out of it.
i agree, it has more than a few drawbacks in terms of physical access. not to mention more heat captured inside a heavily unventilated chassis, what could possibly go wrong...

the amp seems to have fewer heat/location issues vs a previously posted rogue integrated amp a while back.
 
rogue atlas mag - 7.jpg
further excavation of the site revealed ancient writing dating back to before the pharaoh bought his first turn-table somewhere around 1234 bce. the wiring used shows how primitive electrons were carried from site to site in ancient times.

rogue atlas mag - 8.jpg
fuses look ok although one might be original or vice-versa. all measure fine and have same rating..
 
In fact I started doing that to everything quite early in life. There was even a rule in the house that I was not allowed to take apart anything unless it was broken!
are you certain we werent separated at birth, i tend to have a similar modus operandi in regards to unauthorized access/use/possession-of a toolbox (+/- power tools).

plus spending pre-teen years tech dumpster diving when not at grandpa&dads army surplus store which had a warehouse area filled with ww2/korea/vietnam era jeep parts and other things normal children remember growing up around.
 
rogue atlas mag - 9.jpg
stm CL-30 thermistor (ntc) to help reduce inrush would be my guess

rogue atlas mag - 10.jpg
amp is wired for 4r load currently, looks like a headache to change over to 8r.

chances are this type of amp gets abused from an impedance point of view. wonder how that affects output tube life or circuit sanity... then again, its not like speakers have a flat impedance curve to begin with.
 
rogue atlas mag - 11.jpg
hungry power amp depending on bias settings

rogue atlas mag - 12.jpg
top of the four fuses being measured with the analog chassis meter. also probing with the dmm.
 
rogue atlas mag - 15.jpeg
staring the system on a lower mains voltage

rogue atlas mag - 16.jpeg
at 100v it consumes around 100w at idle with all the tubes biased at 25ma (analog chassis meter)
 
rogue atlas mag - 19.jpeg
evaluating hot spots vs electrolytic proximity although installing the chassis cover will increase the oven effect greatly

rogue atlas mag - 20.jpeg
rectifier and wiring definitely heating up
 
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