The most cost effective way to deal with control of listening volume and channel to channel balance is to employ separate L/R mono log. (audio) taper potentiometers. Fact, the tone controls in the unit suck. I've uploaded a schematic for 1 channel of tone controls "done right". Please notice the level of complexity needed.
IMO, your control panel should be (operator's left to right): on/off switch, left volume, right volume, source selection, and tuning. BTW, label the source selector (bottom to top): FM/S, FM, AM, Line 2, Line 1.
Alpha Taiwan Carbon controls from Mouser are low cost and quite decent. Look here.
IMO, your control panel should be (operator's left to right): on/off switch, left volume, right volume, source selection, and tuning. BTW, label the source selector (bottom to top): FM/S, FM, AM, Line 2, Line 1.
Alpha Taiwan Carbon controls from Mouser are low cost and quite decent. Look here.
Attachments
Thanks Eli Duttman. Looks complicated for a newbie like me, but I will keep it incase I dare to try it in the future.
My point is that tone controls should be left out. Very few recordings benefit from their presence. Most of the time, tone controls foul the sound up.
On the subject of mounting switches, pots. etc. in the thick plywood panel, cut mortises/counterbores into the back side of the slab using a Forstner bit, at a drill press.
I agree, thanks. Heh, I took the naked chassis and put it ontop of my computer, set the factory speakers on my desk on each side of the monitor then plugged the audio from the soundcard to the tube reciever. I have been listening to it since yesturday. Even with the paper driver speakers, it sounds sweet. >flac music sounds chrisp and clear. I bought some laser printer safe transparencies today so I will be making the new face tomorow when I borrow a flatbed scanner.
Dave, I am refering to the factory speakers. They are OK, but nothing special.
Also, they are not in speaker boxes. They are just drivers mounted to the grill cloth covered board that used to be screwed to the inside of the radio cabinet.
Last edited:
Coming out of a console, they are likely suited to OB, but likely a bigger one.
A little care & attention can (very likely) make them quite a bit better.
dave
A little care & attention can (very likely) make them quite a bit better.
dave
Holee cow civic protection, my story mirrors yours.
Mine was a month ago the make was Arvin and it was a 75 p 88 I believe, the schematic was inside the cabinet which had a busted back and I pulled the amp out at home and tossed it at the dump. The tube amp and tuner are sitting @ my desk @ home. The tuner is DOA I think, the string in the thing crosses the 2 boards and the dial face which I tossed with the table - yea dumb.
Now the speakers look just like mine as well, except I had 3, 2 tweets and 1 8 inch per side.
The thing did work, but not sweet sounding like you have, more like yea it picked radio etc but it was making a hum like a motorcycle. Yea it cost me 15 bones.
Of course I wrote down the make/model of every console they had in the store and they had over 25, came back did my research on the interwebring and went back 3 days later and scooped up a zenith MM2603, and another arvin 75 p 88.
Those also worked, and they also buzzed and hummed and they are both pristine cabinets so I am trying to hold em intact. Though I am very likely to gut it and get the amp out wihtout damage to the exterior and use it as a storage.
Yea mine all need caps for sure, and an isolation transformer.
Now could I use a power conditioner instead of that transformer ?
Thanks in advance guys.
Cool.
Srinath.
Mine was a month ago the make was Arvin and it was a 75 p 88 I believe, the schematic was inside the cabinet which had a busted back and I pulled the amp out at home and tossed it at the dump. The tube amp and tuner are sitting @ my desk @ home. The tuner is DOA I think, the string in the thing crosses the 2 boards and the dial face which I tossed with the table - yea dumb.
Now the speakers look just like mine as well, except I had 3, 2 tweets and 1 8 inch per side.
The thing did work, but not sweet sounding like you have, more like yea it picked radio etc but it was making a hum like a motorcycle. Yea it cost me 15 bones.
Of course I wrote down the make/model of every console they had in the store and they had over 25, came back did my research on the interwebring and went back 3 days later and scooped up a zenith MM2603, and another arvin 75 p 88.
Those also worked, and they also buzzed and hummed and they are both pristine cabinets so I am trying to hold em intact. Though I am very likely to gut it and get the amp out wihtout damage to the exterior and use it as a storage.
Yea mine all need caps for sure, and an isolation transformer.
Now could I use a power conditioner instead of that transformer ?
Thanks in advance guys.
Cool.
Srinath.
- Status
- Not open for further replies.