Marantz model 1070 recap
- Thread starter Vinyljim
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I had a detailed response typed out on my phone and then like a possessed person it start deleting my response before could post it. #weird
Quick recap of the deleted content. Don't trust any list you find. Read the uF and Voltage ratings off the caps in your amp. Digikey and Mouser are two places people commonly buy radial caps. Neither web site do I find really user friendly, but they normally have everything needed.
Quick recap of the deleted content. Don't trust any list you find. Read the uF and Voltage ratings off the caps in your amp. Digikey and Mouser are two places people commonly buy radial caps. Neither web site do I find really user friendly, but they normally have everything needed.
Lavane
Lunatic Member
I've restored and repaired two 1060's and a 1030. These were the models just before the 1070. The previous two had production end in '74. The 1070 started production in '75. I found a few caps out of spec in each of the three amps. I could have just replaced the failed parts and drifty caps, but I hate having to go back in later when another cap fails.
If its something I'm going to keep, it gets a full recap along with any failed transistors, resistors, diodes, etc. Also any parts known not to age well like some transistors get replaced also. I have just replaced failed caps before only to have to go back in later to replace more.
Do you have a list that may help the OP?
I keep records of things I work on but never had a 1070 on my bench so I can't help with recapping.
Was just wondering if he had a symptom that was showing up that may relate to a problem that wouldn't need a full recap.
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Lavane
Lunatic Member
No, I haven't ever worked on a 1070.
Changes are made by the factory over time and even the schematic can be a little different from what you find inside.
I always go by what I find inside over the schematic. Values get changed, some parts are omitted or added,etc.
I've just always made a list from what I find on the boards as long as it's factory.
The two 1060's I had had some differences between them.
Lavane
Lunatic Member
I had two 1060's at the same time. One got recapped, small value caps replaced with polypropylene film caps, etc.1030 and 1060 restorations here. The results were fantastic
Then I went back and replaced the carbon resistors with metal film on the preamp boards of both the 1030 and 1060. I thought the results were freaking amazing.
Try it, you might like it!
The second one I replaced every carbon comp and carbon film resistor in the amp with 1% and .1% metal film resistors.
There was a definite difference between them. The one with metal films throughout had a little more clarity.
I'm not sure it was worth all the effort to change them all though!
malden
Lunatic Member
It's not like changing batteries.
A "recap" seems to be a catch-all term for restoring a piece of audio gear.
Is this your first "recap" ?
Blue Shadow
Waiting for Vintage Gear from this century
Weclome to ak Vinyljim. First post and you want to dive into a recap. No problem, many folks want to do that.
Do you have the service manual? https://www.audioservicemanuals.com/m/marantz/marantz-1070/458933-marantz-1070-service-manual
Make a list of the electrolytic caps in the unit from the SM and compare that to your actual unit and update the list to what your unit has in it.
With list in hand roll over to Mouser or Digikey and find the capacitors. There will be 25 of each to chose from. We did in the past go with Nichicon PW and HE or Panasonic FM and FC all great regular capacitors better than what is in the unit unless it is a low leakage cap. Use Nichicon UKL for that.
Now Nichicon has end-of-life all 'lytics of the 5 and 6.3mm diameter, most of what we use, in all of their different lines.
Might be best to buy the kit from peace.love.and.music / Affinity For Artifacts as he bought piles of these smaller caps and makes kits of stuff from Digikey or Mouser, known real parts not counterfeits. He is an aker and folks like his kits found floating in the bay.
Do you have the service manual? https://www.audioservicemanuals.com/m/marantz/marantz-1070/458933-marantz-1070-service-manual
Make a list of the electrolytic caps in the unit from the SM and compare that to your actual unit and update the list to what your unit has in it.
With list in hand roll over to Mouser or Digikey and find the capacitors. There will be 25 of each to chose from. We did in the past go with Nichicon PW and HE or Panasonic FM and FC all great regular capacitors better than what is in the unit unless it is a low leakage cap. Use Nichicon UKL for that.
Now Nichicon has end-of-life all 'lytics of the 5 and 6.3mm diameter, most of what we use, in all of their different lines.
Might be best to buy the kit from peace.love.and.music / Affinity For Artifacts as he bought piles of these smaller caps and makes kits of stuff from Digikey or Mouser, known real parts not counterfeits. He is an aker and folks like his kits found floating in the bay.
