528hemi
349 posts
Jan 03, 2013
5:26 PM
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I just picked up a premier 50 from the 60's. The rectifier tube was broken in shipment and I am not sure what it was.
The amp has a 12ax7 7591 and then the rectifier tube and capacitor Can.
Did that amp take a 5y3gt? The pin out matches a 5ar4 I have
Thanks for the help.
528hemi
Last Edited by on Jan 03, 2013 5:32 PM
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Rick Davis
1107 posts
Jan 03, 2013
5:53 PM
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It used a 6X4 rectifier.
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-Rick Davis
The Blues Harp Amps Blog
The Mile High Blues Society
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528hemi
350 posts
Jan 03, 2013
6:04 PM
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Thanks Rick I am going to order one. How does that compare to a 5y3 or 5u4? I assume you cant substitute.
Also, do you know if the orignal speaker was 4ohm or 8ohm? The replacement in this amp is 4 ohm but I saw a schematic which shows 8 ohm but that schematic also did not show the rectifier tube. The amp is also modded with a speaker out.
Also what 8 inch speaker would you recommend for this amp?
EDIT: Just checked some pictures of the 6x4 and it is not what was in this amp. See the picture below. It has 5 pins.
Thanks,
528hemi
Last Edited by on Jan 03, 2013 6:20 PM
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JD Hoskins
392 posts
Jan 03, 2013
6:26 PM
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a 6X4 is a miniture 9 pin tube. A friend of mine has one with a 5V4, but has no idea if it's original, no chart. I would think if the pin out is correct a 5Y3 would be the way to go. My friend has a Kendrick blackframe 8 in his, sounds great for guitar, never heard harp through it.
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"Technical, schmechnical---put some heart in it, dammit!" ~ Paul deLay
Last Edited by on Jan 03, 2013 6:31 PM
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Frank
1792 posts
Jan 03, 2013
6:27 PM
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Your first guess seems more logical...
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Rick Davis
1108 posts
Jan 03, 2013
8:04 PM
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here is the schematic
http://www.webphix.com/schematic%20heaven/www.schematicheaven.com/bargainbin/premier_50.pdf
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-Rick Davis
The Blues Harp Amps Blog
The Mile High Blues Society
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JD Hoskins
395 posts
Jan 03, 2013
10:04 PM
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There seems to be as many configurations of "Model 50s' as there are Champs, Deluxes, twins, Supro Supremes,etc...
My friend has a model 50 like the one above and another that has a 6L6 with a 6X4. Seems there are solid state rectified model 50s as well.
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Rick Davis
1110 posts
Jan 04, 2013
8:11 AM
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Yeah, I'm finding that the Multivox amps (Premier, Marvel, etc.) were pretty flexible on design. I think they changed with the supply of parts, maybe from the lowest bidder.
528Hemi, that is not a 6X4. I'd try a 5Y3 instead. I don't know the ohms of the speaker. One of the schematics I linked to says it is 8 ohms, but my Marvel amp (which was also made by Multivox during the same period) has the same 12AX7 - 7591 layout as your Premier and it has a 4 ohm speaker.
It's a crap shoot... Not much info on these old amps.
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-Rick Davis
The Blues Harp Amps Blog
The Mile High Blues Society
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TetonJohn
43 posts
Jan 04, 2013
8:44 AM
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This is probably obvious to you, but just in case:
Be careful of fit if ordering an alnico speaker -- it looks like the tubes are pretty close to the speaker (hard to tell depth in the photo).
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528hemi
351 posts
Jan 04, 2013
10:34 AM
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I ordered up a 5y3GT.
@TetonJohn, The speaker in there has a huge magnet and there is still soem room. I should be abel to fit any 8" in there if that speaker does not sound good.
528hemi
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