I was recently given this early Periscopic Prism telescopic sight. Unfortunately the cross-wire is missing. Can anybody give me advice on how to replace it?
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I was recently given this early Periscopic Prism telescopic sight. Unfortunately the cross-wire is missing. Can anybody give me advice on how to replace it?
PM me with your E-mail address and I'll do you a step by step photographic strip down for a PP Co scope.
Cheers,
Simon.
Quote:
Originally Posted by Terrylee
That may be only a post type scope.
hey Simon, why not do a photographic breakdown for the Forum, as I'm doing with the No32 sight over the next 6 months or so?
What's the availability of the .001" crosswire. I am using .0008" platinum as I can't get .001 anymore.
Peter,
If you think there would be enough interest I could do one for the Aldis too?
.001 wire is still available in the UK I'll dig out the details of the place I had some from last and pass it to you.
Cheers,
Simon.
Quote:
Originally Posted by Peter Laidler
There would DEFINATELY be a demand. I have got sufficient .0008" wire. Don't forget that I have Patt 18 ocular lenses too
0.001" platinum wire is available in the states, but I've not purchased any since Mr. Laidler specified 0.0008" diameter. So what was the original size? (percentage-wise the difference if pretty significant.)
.001 was the norm for the No32's but the spec for grat blocks, ordered as spare parts after 1970 (intro of the L1A1 I suspect) suggests .0008". It will affect the obfuscation but .......................
I repair using .0008" across the board now
I have 2 PPCo scopes stripped here, one missing cross wire but retaining original post.
The graticule crosswire on PPco scope is not 0.001" thick but I measured it at 0.0025"/0.06 mm thick and appears to be originally Gold wire. See pics, I temporarily stretched some 0.001" wire against original to compare as well and 0.001" wire noticably too thin in my opinion.
I don't have Gold or Platinoid cross wire in this thickness but do have some Tungsten wire.
Also measured pointer post whilst at it and also appears to be gold and is 0.0095"/0.24 mm thick.
It's all a bit academic really because the cross wire is there simply to prevent the sniper canting the rifle. If he was REALLY clever, he could use it as a means of judging range, but not a lot of them went to the front with their old school log tables tucked into their sarnie bags ...., that's 'tucker' bags to you wild old Colonials
Thanks, Chaps! The information supplied is most informative. I'd also appreciate some procedures with "do's and don'ts" concerning stripping the sight. I'm not into working on telescopic sights and would like to avoid the possibility of making any unnecessary error. I'd be grateful, too, if somebody could give me the address of a source of the appropriate wire. This would probably involve an overseas order for me.
Terry
Here's a picture of an original untouched (not by me anyway) PPco graticule from one of my other complete scopes, this will give you I hope a good indication of how thick the crosswire appears compared to say a No 32. I think most people will agree they would want to have the cross wire replaced with like thickness or as near as dammit for originality.
If I had to give you some do's and don't advice Terry, it'd be this. If you ain't done it before, then DON'T do it yourself. You can easily go beyond the point of no return. You've got to be VERY careful soldering the cross wire because if the diaphragm plate gets just a nadger too hot (that's another of these peculiar British Army engineering/technical phrases), then the actual grat post solder melts too..... and then...................
You have to stretch the cross wire too so that when it cools, it doesn't sag like your mum's washing line. If I was you, I'd get a cheap No32 or 42 to play with first. Don't want to put you off but........................
Simon,
Please do a photo essay, when you guys are gone we are all screwed.
The hands on nuts and bolts of all this stuff is lost in 1 generation.
The M1 Garand is one of the best documented rifles at the Govt level, but there is a lot missing and a lot of speculation.
Thanks
Gents,
If you bear with me I'll do one for the PP Co, Aldis and Model 1918. Will try and get started this weekend.:thup:
Cheers,
Simon.
Quote:
Originally Posted by m4carbine
After Peter's question regarding the availability of .0001 wire in the UK I thought I'd check on the latest prices with the folks I got my last lot from:eek:
Platinum wire .0001 is currently approx £190 Excluding Vat per two feet.
Silver wire .0001 is currently approx £95 Excluding Vat per two feet.
Cheers,
Simon.
Mmmmmmmmm, very thought provoking there Simon! And remember that if you make a cock-up (that's another typically English phrase for a mistake ...., albeit an expensive one in this case...) then you've got to do it again ....., and in some cases, again!
Things that can and do go wrong are it not being exactly square but only visible when it's back together! Goes slack after its cooled, visible twist in the wire and so on
B. Sullivan has repaired "a few" scope crosshair assemblies for me and other folks using no heat methods to attach the filaments. I know of several that have held up to many rounds and years since repair w/o problems, but I still figure solder and platinum will last longer (past my time, I reckon).
He can also delaminate and reglue lenses!
Peter,
I overcame that little problem by getting my hands on some solder of different melting points.
If you need some low melting point solder let me know and I'll pop some in the post.
Cheers,
Simon.
[QUOTE=Peter Laidler;30821] You've got to be VERY careful soldering the cross wire because if the diaphragm plate gets just a nadger too hot (that's another of these peculiar British Army engineering/technical phrases), then the actual grat post solder melts too..... and then...........QUOTE]
I have some spare gold wire if anyone needs any. send me a private email.