Discussion in 'Audio Visual' started by aokman, Oct 25, 2009.
Keep up the good work mate
can you put up a youporn clip for us??
yup movies to come just got the get the front back together then i can hook it up to the floor standers
isnt idle current alittle high? its suppose to be 10mvdc (25mA) according to my lil book here >.<
yeah sorry i shoulda mentioned i havnt touched them yet as i want to finish assembling the unit first.
Great read, have been thinking about doing this to my old marantz. It's the 4140 model all the lights are out and i'm sure there's more wrong inside.
Marantz amps just keep going strong, the older they are the more beautiful they become.
they really are amazing amps, ive never seen that sort of build quality before... Really the only things that stop them running are stupid things like oxidized switches and maybe a cap or 2
you might like this aswell
Bet the new ones aren't made like that anymore.
How hard/easy has the cleaning process been? Everything been pretty straight forward?
well i will say it definitely isn't for a beginner if you want to completely strip it out and rebuild it. But it is certainly something worth learning aswell if your handy with a soldering iron and interested as its really worthwhile seeing how things were done back then by reversing the build
Very nice amp aswell, im chasing more marantz amps from the same ERA especially one with a scope
About the only annoying thing about these amps is the lack of detachable connectors on the boards most of the time you will have to cut wires label them and resolder them afterwards...
That's probably one of the reasons they were so robust. Less change of connection coming loose, falling out etc.
update time again
plenty done this weekend, all of the bulbs have now been replaced with LED's - i have fitted diffuser blocks for all the source lights and fiddled with the main lighting until i got the uniform blue i was looking for
Also at the last minute i decided to install 3.3uf metal film bypass caps in parallel with the main filter caps.
Faceplate is back on and now i can work on the amp without fear of shorting something out
looks awesome, well done. Shame we cant all hear it
you will soon i dont want to spoil it for you yet
The blue LED lighting came out a bit tacky don't you think? Or perhaps it looks worse on the photo.
its not that blue in real life, its a bit lighter i set it up to simulate what these amps used to look like back in their prime, they were always blue
wats the bypass cap do?
Ummm thats the colour of them originally n00b.
mhm... their a little greener... in real life compared to that photo
basically a bypass cap is put in to lower the output impedance of the electrolytic filter caps. They will smooth the power out even more
They are very durable and quite expensive however @ $7 each for just 3.3uf @ 250v. Ive seen them up to 10uf @ 250v but they are very very big and cost about $25 each
When i say expensive i mean relative to a 25c panasonic electrolytic of the same value
tacky? as if. looks fantastic IMO
they are a little bit, but mostly blue people have just forgotten what they look like, there are some pics of them using original light bulbs, they go green from age as the paper diffuser behind the plastic plate ages
heres one with original lights restored...