sweetbeats
Reel deep thoughts...
Yes, you did.
I suppose I could have said "Regarding the AUX busses you're only maybe partially right..."
I suppose I could have said "Regarding the AUX busses you're only maybe partially right..."
The hum is consistent regardless of the fader position, correct?
Yup. even with the fader pulled all the way down. You plug a jack in and instant hum on all 4 RCAs
I'll slide it off the table to see if there is any damage on the bottom. There is a possibility of something shaken around maybe? It did a 9 hour stretch on I-5 and some of the pavement was not the smoothest in the world.
Playing around I found one more tick. but just one. the talkback mic don't work. hmmmm. Not that I need it right now in a one room studio, but it would be preferable to have everything function.
One unrelated question..........what the hell does the slate pot do?????????? test tones work.
EDIT:
Just checked the underbelly. No visible sign of damage. However, the whole ass end (jack panel) including meter bridge wiggles.Not crazy wiggle like it is falling apart, but a bit loose. Looks like someone had this apart and was not all too conscientious about re-assembly. I will investigate further.
I suspect somebody had it apart trying to resolve the same problem you are having with hum. There are 6 screws that fasten the backplane and meter bridge to the rest of the chassis...right there above the channel and master modules. Are they there? If not that would explain the loose meter bridge and such. With those 6 screws out the meter bridge and backplane tip back/open up like the hood of a corvette.
Meters are fine and are sourced correctly. And yes, they are happily bouncing around to the source.Question: When you have signal routed to the STEREO A buss, and you plug something into the output jacks and you get the nasty hum, what are the meters doing? Are they still happy and bouncing around to your source material you can still hear all nicey like in your headphones? Or do they go nasty steady to match the hum? I suspect they are still happily bouncing around to the source, yes? (make sure you have the meters sourced to the STEREO A buss and not the AUX 1/2 buss)
Regarding the slate pot...do you have the manual? Look on page 34. Study that. The SLATE pot controls the level of the talkback mic to the slate (busses 1~8) and AUX 1/2 and AUX 3/4 assign switches in the SLATE/TEST TONE switchrack. When the SLATE/OFF/TEST TONE switch is set to SLATE, then you can route the talkback mic to the SLATE, AUX 1/2 or AUX 3/4 busses using the momentary assign switches in the SLATE/TEST TONE switchrack. In that state the SLATE level pot controls the level of the talkback mic to those busses. The TALKBACK level pot controls the level of the talkback mic exclusively to the STEREO B buss when you press the T/B switch in the SLATE/TEST TONE switchrack regardless of the SLATE/OFF/TEST TONE switch position. My hunch is the talkback mic works, you just need to get cozy with HOW it works, but check it out and report back.
UPDATE:
Stereo master b reads 45k, while master a reads open.
upon further testing. I discovered that on master B if I do a continuity check. I'll get full continuity when touching any of the grounds of the rca jacks. (Anywhere on the board)
Master A gives me nothing. So it would apeappear that whole block of 4 jacks is not grounded.