The not uncommon 'thin sound' scenario. No, it's not anything to do with
the roll-off switch (checked by substitution). The voice-coil in contact
with the pole-piece I suspect.

Seems the old version capsule is no longer obtainable, and from what I
gather the '-II' version is not physically compatible.

Can anybody here confirm if this is correct, or should I be able to get
the 'II' to fit (and work somewhere near spec) in a 'classic' body ?

TIA

geoff

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On 13/07/2022 4:50 pm, [email protected] wrote:

geoff wrote:
===========

The not uncommon 'thin sound' scenario. No, it's not anything to do with
the roll-off switch (checked by substitution). The voice-coil in contact
with the pole-piece I suspect.

** All the times I have seen that problem it was due to magnetic particles depressing the VC into the gap.
Tiny bits of nickel plate flung off drum parts & frames is one source.
Tricky to remove but can be done with a small screwdriver tip.

...... Phil

Thanks for the tip - will take a peek .

geoff

--- SoupGate-Win32 v1.05
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geoff wrote:
===========

The not uncommon 'thin sound' scenario. No, it's not anything to do with
the roll-off switch (checked by substitution). The voice-coil in contact
with the pole-piece I suspect.

** All the times I have seen that problem it was due to magnetic particles depressing the VC into the gap.
Tiny bits of nickel plate flung off drum parts & frames is one source.
Tricky to remove but can be done with a small screwdriver tip.



...... Phil

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

geoff <[email protected]> wrote:

The not uncommon 'thin sound' scenario. No, it's not anything to do with
the roll-off switch (checked by substitution). The voice-coil in contact
with the pole-piece I suspect.

Seems the old version capsule is no longer obtainable, and from what I
gather the '-II' version is not physically compatible.

Can anybody here confirm if this is correct, or should I be able to get
the 'II' to fit (and work somewhere near spec) in a 'classic' body ?

You might be able to get it to fit, but then it will sound like a -II which really there's little point to.

The element on the original 421 is designed to be repairable. The diaphragm and coil pop off, you put a new one on and center it with shims and go. The problem is that they haven't actually sold the repair parts any time in the past half-century.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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