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From: N_Cook on 4 Aug 2010 03:33
hr(bob) hofmann(a)att.net <hrhofmann(a)att.net> wrote in message
news:8a5f11bb-2bf9-4e45-af3b-99679e34f885(a)q35g2000yqn.googlegroups.com...
On Jul 31, 11:03 am, "N_Cook" <dive...(a)tcp.co.uk> wrote:
> Meat Plow <mhyw...(a)yahoo.com> wrote in message
>
> news:pan.2010.07.31.15.03.11(a)hahahahahahahah.nutz...
>
>
>
>
>
> > On Sat, 31 Jul 2010 14:20:52 +0100, N_Cook wrote:
>
> > > Meat Plow <mhyw...(a)yahoo.com> wrote in message
> > >news:pan.2010.07.31.13.02.48(a)hahahahahahahah.nutz...
> > >> On Sat, 31 Jul 2010 11:07:31 +0100, N_Cook wrote:
>
> > >> > Owner has managed to get away with dragons teeth retaining clips
> > >> > digging into the glass envelope of his replacement type with no
> > >> > bakelite base . How to fabricate something approximating those
woven
> > >> > glass mesh baskets that go over the envelope and then a pair of
> > >> > springs down to the chassis or any other ideas other than replacing
> > >> > with based envelope types ?
>
> > >> > Incidently the first thing I did was undo the screws of the dragons
> > >> > teeth in hope of relieving some of the teeth force before removing
> > >> > the valves , but was that the correct approach?
>
> > >> Make something like Marshall used. Metal cap and springs.
>
> > > I don't fancy making a pierced metal dome shape, that has to avoid the
> > > fragile central area of the glass dome. So far I'm thinking of a
length
> > > of high temp glass sleeving knotted into a ring, slightly smaller than
> > > envelope circumference, with a balancing "knot" on the other side.
Then
> > > silicone sleeving or springs and glass sleeving down to a pair of
solder
> > > tags as anchors. Nasty dragons teeth chips in the bottles but they
> > > survived
>
> > I think making an approximation of the Marshall device is your best bet.
> > They seem to not harm the glass in any I've worked on. And putting those
> > kind of 5881's in a jaw clamp is just plain idiotic. Especially if the
> > tubes hang.
>
> Another awkwardness of the Marshall ones is the tension points must be a
> good inch below the bottle tops and part wrap around to avoid sliding off.
> Yes underslung 2002 German Engl E320 50W combo.
> First time I've come across one of these , to do anything you have to take
> the whole amp to bits. Surprisingly 2 plain washers were split, probably
> from using a windy-drill to torque up. Even the maker's ECC83 retainers
are
> an awkward bodge-up, not even fully screening.- Hide quoted text -
>
> - Show quoted text -

For those of us on the west side of the big pond, are you talking
about shields or about mounting clips to hold the tubes in place when
they are mounted other than pins down??

reply

Not shields , these are output devices. We would call them retainers , just
to keep the valve in its socket , especially when upside down like here. Of
course shields also retain usually, dual function




From: hr(bob) hofmann on 5 Aug 2010 22:31
On Aug 4, 2:33 am, "N_Cook" <dive...(a)tcp.co.uk> wrote:
> hr(bob) hofm...(a)att.net <hrhofm...(a)att.net> wrote in message
>
> news:8a5f11bb-2bf9-4e45-af3b-99679e34f885(a)q35g2000yqn.googlegroups.com...
> On Jul 31, 11:03 am, "N_Cook" <dive...(a)tcp.co.uk> wrote:
>
>
>
>
>
> > Meat Plow <mhyw...(a)yahoo.com> wrote in message
>
> >news:pan.2010.07.31.15.03.11(a)hahahahahahahah.nutz...
>
> > > On Sat, 31 Jul 2010 14:20:52 +0100, N_Cook wrote:
>
> > > > Meat Plow <mhyw...(a)yahoo.com> wrote in message
> > > >news:pan.2010.07.31.13.02.48(a)hahahahahahahah.nutz...
> > > >> On Sat, 31 Jul 2010 11:07:31 +0100, N_Cook wrote:
>
> > > >> > Owner has managed to get away with dragons teeth retaining clips
> > > >> > digging into the glass envelope of his replacement type with no
> > > >> > bakelite base . How to fabricate something approximating those
> woven
> > > >> > glass mesh baskets that go over the envelope and then a pair of
> > > >> > springs down to the chassis or any other ideas other than replacing
> > > >> > with based envelope types ?
>
> > > >> > Incidently the first thing I did was undo the screws of the dragons
> > > >> > teeth in hope of relieving some of the teeth force before removing
> > > >> > the valves , but was that the correct approach?
>
> > > >> Make something like Marshall used. Metal cap and springs.
>
> > > > I don't fancy making a pierced metal dome shape, that has to avoid the
> > > > fragile central area of the glass dome. So far I'm thinking of a
> length
> > > > of high temp glass sleeving knotted into a ring, slightly smaller than
> > > > envelope circumference, with a balancing "knot" on the other side.
> Then
> > > > silicone sleeving or springs and glass sleeving down to a pair of
> solder
> > > > tags as anchors. Nasty dragons teeth chips in the bottles but they
> > > > survived
>
> > > I think making an approximation of the Marshall device is your best bet.
> > > They seem to not harm the glass in any I've worked on. And putting those
> > > kind of 5881's in a jaw clamp is just plain idiotic. Especially if the
> > > tubes hang.
>
> > Another awkwardness of the Marshall ones is the tension points must be a
> > good inch below the bottle tops and part wrap around to avoid sliding off.
> > Yes underslung 2002 German Engl E320 50W combo.
> > First time I've come across one of these , to do anything you have to take
> > the whole amp to bits. Surprisingly 2 plain washers were split, probably
> > from using a windy-drill to torque up. Even the maker's ECC83 retainers
> are
> > an awkward bodge-up, not even fully screening.- Hide quoted text -
>
> > - Show quoted text -
>
> For those of us on the west side of the big pond, are you talking
> about shields or about mounting clips to hold the tubes in place when
> they are mounted other than pins down??
>
> reply
>
> Not shields , these are output devices. We would call them retainers , just
> to keep the valve in its socket , especially when upside down like here. Of
> course shields also retain usually, dual function- Hide quoted text -
>
> - Show quoted text -

I went to the web site in an earlier message. THey had retainers and
shields. I had never seen retainers of the type they showed. So I
learned something new.
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