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From: N_Cook on 31 Jul 2010 06:07
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?


From: Meat Plow on 31 Jul 2010 09:02
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.
From: N_Cook on 31 Jul 2010 09:20
Meat Plow <mhywatt(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


From: Meat Plow on 31 Jul 2010 11:02
On Sat, 31 Jul 2010 14:20:52 +0100, N_Cook wrote:

> Meat Plow <mhywatt(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.
From: N_Cook on 31 Jul 2010 12:03
Meat Plow <mhywatt(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 <mhywatt(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.


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