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marantz 1200

  1. N

    Difficult Marantz Decision

    Recently I picked up a few marantz amplifiers and I am lost for choice. I have a couple different setups depending on the room. I have a Marantz 2250b running my 6300 turntable into Vandersteen vsm bookshelves. I don’t really want to change this configuration. My main system is actually a...
    • Nimslo
    • Thread
    • marantz marantz 1200 marantz model 18 marantz model 19
    • Replies: 5
    • Forum: Marantz Audio
  2. kasbah512

    Selective Ground Loop Hum... HELP Please.

    This is somewhat me circling back to an issue I was having months ago. I've been working on a Marantz 1200 on and off for a long time. I'm convinced its possessed by the previous owner at this point... The issue: -Ground loop-ish hum on the right channel only (next to the transformer)...
    • kasbah512
    • Thread
    • fully restored ground loop help hum marantz marantz 1200
    • Replies: 1
    • Forum: Solid State
  3. ocdecio

    1200 Preamp-Amp Jumpers / Hum

    The 1200 I am working on has both amplifier boards working properly, so I decided to connect it to the preamp for some more testing. However when I use a "custom" jumper (two RCA connected with a short cable - I don't have the originals) I get a lot of hum, like real loud. These jumpers connect...
  4. ocdecio

    Biasing a Model 1200

    To what extent the 240/250 procedure of biasing by checking the voltage across R531/R532 at 12-15mv applies to a 1200? The 250 has a higher rail voltage (58V vs 52V) given that it is 125WPC whereas the 1200 is 100WPC. The reason I ask is that it seems like setting it to 12-15mv distorts the...
  5. ocdecio

    Parasitic oscillation?

    After rebuilding the left channel on a 1200, I finally was able to get some bias (connected to the DBT). However as soon as bias start to inch up, the output waveform gets all distorted. When I turn it off, for some seconds the waveform cleans up before fading away. Have anyone seen this...
  6. ocdecio

    Model 1200 - bias doesn't go above 0mV

    I just finished rebuilding the left amplifier channel of a 1200. I checked voltages connected to a DBT, and they all seem to be pretty close. Light dims, and when I connect it to a signal generator I get a clear, amplified wave in the output. DC is close to 0mv. However no matter what I do I...
  7. ocdecio

    Marantz 1200

    I may be restoring a 1200, depending on if I can get it from "that" site. This is what the seller says: "Selling for parts or restoration. I ran a DAP into the auxiliary inputs and I had no sound from the headphones or any of the speaker outputs." Hmm.. I wonder why... Well time will tell...
  8. Paul89

    Marantz 18 vs marantz 19 Receiver HELP PLZ!!

    Hey guys, I've read a ton of your stuff and you guys are awesome. First post here! Looking for the vets of audiokarma and Marantz expert like Brian. Echowars. The military gentlemen I cannot recall his name and mike zaccarro ex marantz tech or any other marantz techs and SME's. I'm a Marantz...
    • Paul89
    • Thread
    • marantz 1200 marantz 19 marantz model 18
    • Replies: 50
    • Forum: Marantz Audio
  9. R

    No power to Marantz 1200

    I recently pulled a vintage Marantz 1200 out of storage. Unit takes a while to power on (a few minutes sometimes) but eventually works. Drives Infinity K8's to moderate volume ( I live in an apartment) , phono section works fine, and headphone is fabulous with HD600s However, the other day...
  10. M

    Marantz 1200- should I recap?

    Hi everyone, first time posting! I just got picked up a Marantz 1200 integrated amp and 120 tuner from a single owner who barely used the two units (only $300!). They look nearly in mint condition minus some dirt on the face plates I can clean pretty easily. here's the inside of the 1200...
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