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Old 17th March 2006, 03:35 PM   #1
Rnickl is offline Rnickl  United States
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Default Planar 78 ?

Can anyone tell me what would be involved to convert a Planar 78 to play 33's.

I just saw one for $60. I think is worth buying just for the RB250. Any thoughts.

Thanks,
Rick
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Old 17th March 2006, 04:04 PM   #2
sreten is online now sreten  United Kingdom
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Hi,

presumably you would need to replace the cartridge or its
stylus, and fit the smaller two step 33/45 rega motor pulley.

/sreten.
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Old 17th March 2006, 04:11 PM   #3
Rnickl is offline Rnickl  United States
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Is the tone arm wiring the same for mono and stereo? Will I be able to just switch the cart?

Just a pully swap? That sounds easy enough. I was expecting a motor swap.

Thanks
Rick
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Old 17th March 2006, 04:35 PM   #4
sreten is online now sreten  United Kingdom
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Hi,

I assumed Rega don't have a special 78 motor.

Most mono cartridges now have stereo pins but are internally shorted.
So the RB250 should be entirely standard.
If the arm is actually mono, then you'd need to desolder a link in the armbase.

/sreten.
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Old 17th March 2006, 04:45 PM   #5
wytco0 is offline wytco0  United Kingdom
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Is this real? I have never heard of a 78 rpm Rega? I had a Rega Planar 3 for years and it could only do 33 and 45.
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Old 17th March 2006, 07:00 PM   #6
Rnickl is offline Rnickl  United States
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I just went and picked it up. Score for $60.

It lookes identical to the P2 except for the name on it. The clips at the cart are just soldered together, so that's an easy fix. I'll just have to turn a pully tonight on my mini lathe and I'll be rockin' out.

Thanks,
Rick
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Old 17th March 2006, 08:09 PM   #7
tubenut is offline tubenut  South Africa
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Quote:
Is this real? I have never heard of a 78 rpm Rega?
Very real.....

Seems like a bargain of note at USD60.00
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Guillaume
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Old 17th March 2006, 08:15 PM   #8
Rnickl is offline Rnickl  United States
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Anybody know what the motor RPM is?

I measured the motor pulley at 13.75mm and the platter pulley at 56.7mm, spining at 78 RPM gives me a motor RPM of 321.6. This dosen't seem correct. The motor pulley was a bit hard to measure, but I think I must be accurate within .5mm.
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Old 18th March 2006, 09:15 AM   #9
AMV8 is offline AMV8  United Kingdom
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I also own a planer 78.

I asked rega if I could convert to 33/45. They confirmed that you can and sent me the replacement pulley for free - good of Rega. The actual pulley needed will depend upon whether you have a metal or plastic sub chassis.
The arm is the standard rega rb250 and has four wires already although only 3 are used with the 78 cartridge.
Don
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Old 18th March 2006, 11:49 AM   #10
sreten is online now sreten  United Kingdom
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Hi,

note the pulley required will be also need to be for 60Hz mains.

/sreten.
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