Pioneer PL-71 Refurbishment

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Quarknosis
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Pioneer PL-71 Refurbishment

Unread post by Quarknosis » Wed Mar 22, 2017 11:15 am

Here are some pictures of the PL-71 as received from savvypaul.

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The aptly named dustlid was missing it's hinge fixings, I've already ordered a replacement set.
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The immediate problem looks like it is going to be the stains on the wood at the edge of the plinth and the front face. I'll have to get some advice on how best to deal with these issues
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The strobe light is working and the trim pots haven't drifted out much, on both speeds they give correct speeds at around 60% of their travel. Speed itself looks stable by the strobe. No immediate need to be changing capacitors but something to keep in mind for a later date.
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I have briefly tried Denon DL-110 and Nagaoka MP-110 cartridges both sounding very good when using the overhang gauge to set them up.

The armlift will need some attention as it drops like a stone when released, I should have some silicone oil in the garage to service it. As I tend to hand cue this isn't a major problem but something I would like to get right.

I haven't had chance to have a good look at the spring feet yet, one of them is sitting higher than the rest, but they look as though they should be adjustable.
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TheMadMick
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Re: Pioneer PL-71 Refurbishmant

Unread post by TheMadMick » Wed Mar 22, 2017 5:22 pm

It might be worth trying some steel wool on the stained parts and then finish the top in a hard wax like Treatex. It will always come off again with white spirit and steel wool. However, the Treatex is quite expensive and comes in quite large volumes - enough to do many deck tops. :-?

Hope this helps?
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Quarknosis
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Re: Pioneer PL-71 Refurbishmant

Unread post by Quarknosis » Wed Mar 22, 2017 5:36 pm

TheMadMick wrote:It might be worth trying some steel wool on the stained parts and then finish the top in a hard wax like Treatex. It will always come off again with white spirit and steel wool. However, the Treatex is quite expensive and comes in quite large volumes - enough to do many deck tops. :-?

Hope this helps?
Thank you for the info.

I passed up the chance to get some steel wool on the way home from savvypauls as it was graded as coarse, even though it look to be finer to me. I'll look into the cost of the Treatex
NVA AP70sa - LS6 - Doc Mod JPW P1 - Lenco/Jelco/Denon DL110 - Cocktail Audio X30 > Rega DAC. TIS & SSC

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jayman67
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Re: Pioneer PL-71 Refurbishmant

Unread post by jayman67 » Wed Mar 22, 2017 5:45 pm

a word of caution,the plinth may have lightened or darkened with age,so any sanding may make the stained areas a different colour.is the stain water damage ?

i would strip the plinth with paint stripper first and see how it looks when wiped with meths or white spirit,you may get the stains out with the stripper. :guiness;
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Quarknosis
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Re: Pioneer PL-71 Refurbishment

Unread post by Quarknosis » Wed Mar 22, 2017 9:04 pm

jayman67 wrote:a word of caution,the plinth may have lightened or darkened with age,so any sanding may make the stained areas a different colour.is the stain water damage ?

i would strip the plinth with paint stripper first and see how it looks when wiped with meths or white spirit,you may get the stains out with the stripper. :guiness;
Thanks Jayman,

is something like Nitro-morse ok in this sort of situation or would it require something gentler? I've got some for another project for stripping some varnish so I could use that if it's going to be ok, otherwise I have another brand of stripper (can't remember which right now) which does the job but seems less effective.
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Re: Pioneer PL-71 Refurbishment

Unread post by zebbo » Thu Mar 23, 2017 8:44 am

Nitromors should be fine although the modern "safe" stuff is pretty shite compared to the original.
I take it that you are dismantling the TT to do this?
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Re: Pioneer PL-71 Refurbishment

Unread post by Daniel Quinn » Thu Mar 23, 2017 9:43 am

The plinth is solid wood is it not . It seems to me that the only way to do it would be to sand it back to bare wood and restain it , anything else is likely to look patchy .
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Quarknosis
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Re: Pioneer PL-71 Refurbishment

Unread post by Quarknosis » Thu Mar 23, 2017 10:22 am

zebbo wrote:Nitromors should be fine although the modern "safe" stuff is pretty shite compared to the original.
I take it that you are dismantling the TT to do this?
Daniel Quinn wrote:The plinth is solid wood is it not . It seems to me that the only way to do it would be to sand it back to bare wood and restain it , anything else is likely to look patchy .
Yes I will have to dismantle the TT because whether stripping or sanding I wouldn't want to cause any damage to the plastic and metal parts. I'll find out if the plinth is solid when I do this, pictures that I have checked have been inconclusive but there's definitely some plywood in the construction, whether that includes the plinth or not time will tell.
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Alfi
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Re: Pioneer PL-71 Refurbishment

Unread post by Alfi » Thu Mar 23, 2017 11:13 am

The plinth is walnut veneered plywood (looks to be marine grade) but the veneer is commercial grade so 0.6mm thick, be careful as it won't take too much sanding.

A very light sanding with 600/1000 grade paper should be all that's required and then use a Danish oil to finish it. The Danish oil will protect the veneer layer and bring out the natural colour.


Alfi.
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Re: Pioneer PL-71 Refurbishment

Unread post by Classicrock » Thu Mar 23, 2017 11:27 am

Why not sand the wood down smooth then prime it and finish with a few coats of Black followed by a clear gloss lacquer. (preferably using a spray) Otherwise obtain a real wood veneer of choice and re-cover it. Finish with clear varnish or oil.

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