[ARC5] Hewlett Packard Signal Generator HP-606B - Removing screws

[Richard Knoppow]

----- Original Message ----- 
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: "WB6KBL Knoppow, Richard" <1oldlens1 at ix.netcom.com>; 
"ARC-5 Mail List" <arc5 at mailman.qth.net>
Sent: Thursday, March 01, 2012 7:22 PM
Subject: RE: [ARC5] Hewlett Packard Signal Generator 
HP-606B - Removing screws



Xcelite makes several hex wrenches in 7/64 " size.
The 99-PS-60 set contains both 7/64 AND 9/64.
The small short set (forget the set number) has
the 7/64 as one of the eight bits in the set.

Quite a few other tool suppliers have these. I
suspect you can even get them in the "T-handle"
style.

I did not intend to mislead when I "GUESSED" that
the know screws MIGHT be Bristol/spline.

    I don't think -hp- ever used Bristol head screws, what 
they did use a lot of were Pozidriv screws. These look like 
Philips head but Philips screwdrivers will not work and will 
bugger them. Pozidriv screws do not cam out as easily as 
Philips and are more suitable for use in power operated 
drivers so they were popular for a time.  However, they were 
not in use very long before being replaced mostly with Torx 
or other odd driver patterns. I got a set of Pozidriv 
screwdrivers from Excelite, I think also via Amazon.
    Los Angeles is a very big city and still an important 
center for electronics, but odd tools and hardware are not 
obtainable here so I've gotten to rely more and more on the 
internet.  Also for many parts; just try to find stuff like 
high voltage film capacitors or lots of other boatanchor 
type parts. Its getting so that the folks in stores where 
you would expect to find things never even heard of them.  A 
young fellow in a hardware store I went into never heard of 
shellac! Wait until you need parts for old plumbing...




--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com