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The five valves used by
Quad II's - from left to right: 2 x Mullard
EF86, 1 x Mullard GZ32, and 2 x GEC
KT66. (see info section
for valve equivalents page) Quad
II's are very gentle on their valves,
consequently these are the original ones fitted.
Don't let sneaky dealers sell you brand new
KT66's in exchange for your old
GEC KT66's as the old GEC's sound detectably
smoother, and last for ages... |
| The Quad 22 control uses
2 x Mullard EF86, and 2 x Mullard
ECC83. (see info
section for valve equivalents page)
Pictured here are some boxed NOS
(New Old
Stock)
Mullard 86 and 83 valves that were manufactured
at the same time as the Quad 22/II system
featured on this site. |
 |
 |
...a couple of vintage GEC
KT66's glowing
away in the output stage of a Quad II... |
| ...and a couple of NOS
GEC KT66 brand new boxed. On NOS GEC KT66's
(and well-preserved used examples) you can see under the legend "KT66",
a four digit date code. This gives the year
and month of manufacture - ie 7304
means it was made in April 1973... |
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The Quad FM1 uses a total
of 7 Brimar valves: 2
x 6BH6, and 1 each of 6BJ6,
6AU6, 12AX7,
6AL5, & 12AT7.
(see info section for valve
equivalents page) Pictured opposite are a couple of boxed
NOS valves - a Brimar 12AT7, and a
6AL5 in its adaptor...
|
| The
AM2 only uses
4 valves - all
Mullard: EBF89,
EF89, ECH81,
& EM84. (see
info section for valve equivalents page)
The EM84
is a "magic eye"
tuning indicator
- pictured opposite...
on to the next element?...
new - Quad
AM2
|
 |
valves...