j.harv
@#$%
Okay. I started a thread like this about a year ago. I did start to do a set up on my second 388 but gave up and sent it off to a tech. Now I have decided to drag my first 388 out and try it for myself. Im not gonna go all out with the frequency response,T.H.D,cross talk,S/N ratio etc... I just want to set the meters,record playback levels and Im guessing Bias, which has to be done before recording levels.
I have a test tape, signal generator/scope software and True RMS multi-meter.
I have ran across a few things I don't understand. Im not expecting a tonne of time from anyone or a complete walkthrough,I have just ran into a couple snags. I know explaining can take time.
I have gone through the first steps in lining up the meters and checking the mixer with tones.So far so good.
Now Im at the recorder/reproducer section. Step 1-5-1 is telling me to load the test tape and produce 400Hz . My tape doesn't have that freq. There is only one tone on the tape for rec/repro and that's the last one on the tape. It's the 1khz if im correct.
I did use this tone for the repro level and it worked out. Just want to be sure thats correct.
Next step would be Bias. Now, I tried this with no luck. Im going with Sweetbeats bias level for RMG LPR53, which he came up with 110mv.
I connected the multi meter to TP2 and TPG and got a reading of something like .200
Im guessing this is high. So I tried to adjust the bias trim pots and they did nothing. The number didn't change at all no matter how far I turned it.
I'll leave it hear for now, I did skip over to the recording level adjustment and ran into problems there too which I'll explain a little later.
This is probably as far as I want to go with the set up.
Any thoughts on these issues.????
I have a test tape, signal generator/scope software and True RMS multi-meter.
I have ran across a few things I don't understand. Im not expecting a tonne of time from anyone or a complete walkthrough,I have just ran into a couple snags. I know explaining can take time.
I have gone through the first steps in lining up the meters and checking the mixer with tones.So far so good.
Now Im at the recorder/reproducer section. Step 1-5-1 is telling me to load the test tape and produce 400Hz . My tape doesn't have that freq. There is only one tone on the tape for rec/repro and that's the last one on the tape. It's the 1khz if im correct.
I did use this tone for the repro level and it worked out. Just want to be sure thats correct.
Next step would be Bias. Now, I tried this with no luck. Im going with Sweetbeats bias level for RMG LPR53, which he came up with 110mv.
I connected the multi meter to TP2 and TPG and got a reading of something like .200
Im guessing this is high. So I tried to adjust the bias trim pots and they did nothing. The number didn't change at all no matter how far I turned it.
I'll leave it hear for now, I did skip over to the recording level adjustment and ran into problems there too which I'll explain a little later.
This is probably as far as I want to go with the set up.
Any thoughts on these issues.????
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