Advertisement
E A I E B 5 . 1 . 1
F u s e a n d s w i t c h
EA/E85.1 .2
110v operation
EA/E85.2
Output
E A I E B 1 0 C o m m o n f a u l t s P Z S a n d P Z 6
EC
PZg
EC1
Description
EC2
Circuit
EC3
Layout
Z I
27
21
28
28
29
29
EC4
E C 5
trLO
F
F A
F A I
F43
Performance
C o n n e c t i o n s
V o l t a g e a d j u s t m e n t
Other parts
Project 805 masterlink
Description
LayouI
A p p e n d i x
S e r v i c e a n d G u a r a n t e e
M o d u l e s i n g r o u p s B C & D a r e i n t e n d e d t o w o r k f r o m a p o w e r
supply of group E or from any other source of voltages between 25
a n d 3 5 ( s o m e m o d u l e s d o w n t o 1 2 v a n d s o m e u p t o 5 5 v o l t s ) . T h e
p o w e r s u p p l y s h o u l d b e c h o s e n i n c o n j u n c t i o n w i t h t h e p o w e r
amplifiers: it will also drive whatever preamp modules you choose.
B Signal sources
B A F M ( V H F ) T u n e r i n t e n d e d t o r e c e i v e F M t r a n s m i s s i o n s , 8 8 M H z
t o 1 0 8 M H z .
BB Decoder intended to be used in conjunction with the tuner to
convert it to stereo receotron.
These two modules could be installed {with a PZS) to work with an
amplifier other then a project 80.
It is also possible to use the decoder with tuners other than the
proiect 80 tuner to convert them to stereo.
C Preamps and control systems
CA Project 80 Preamplifier. A stereo preamp,/control unit. lt is the
heart of any amplifier made from project 80 modules.
CB Active Filter Unit (AFU). An optional addition to extend the basic
facilities of the project 80. lt is intended to improve performance
where old records are used, or when cl'reaper turntables are used.
CC SO Decoder. For quadraphonic sound an SO decoder, two more
power amps and possibly a second power supply are added to the
existing stereo unit. The decoder also has its own tone and volume
controls for the rear channel. The decoderis covered by a separate
m a n u a t .
D Power amplifiers
DB 260 for all systems up to25W (8 ) or 40 W with 4 . For higher
powers (up to 50W into 15 or 80W into 8 ) two 260's can be used
back-to-back. The full advantage of a 260 over the 240 can only be
realised when using PZ8 to power the system.
DA 240 for all systems up to 18W RMS into 4Qspeakers.
E Power supplies
EA PZs suitable for smaller domestic situation of 5 + 5W stereo or
1 0 W m o n o .
EB PZO a higher powered version for up to 25W total output (12W +
1 2 W i n t o 8 O ) .
240's will normally be used with PZ5 or P76. Although 260's can
be used, there is no advantage unless a PZ8 is chosen. PZ5 and PZ6
are both mains operated and \220-240 volts) and can be adapted for
1 1 0 - 1 2 0 v o o e r a t i o n .
EC PZ8 a high powered voltage stabilizer with sophisticated protec-
tion circuitry built in, and performance tailored to match two 260's
working into BQ, delivery 25 + 25V1 . The PZ8 can also power other
c o m b i n a t i o n s b u t t h e t o t a l a u d i o o u t p u t s f r o m i t w i l l b e l i m i t e d t o
about 50W (e.g. 50W on mono, or 25 + 25W stereo, or 4 x 12Yz\N
o n q u a d r a p h o n i c ) .
The PZ8 is not mains powered and requires a separate transforme
rated at 40V,2A.
F Other parts
FA Masterlink a connecting panel with output and input sockets
fitted.
FC Switch module containing a mains switch and neon indicator.
These two modules are included in the Project 805 which also
contains the Project 80 Preamplifier 2 240's and PZ5 with ready
tagged wires to allow solderless assembly. Project 805 is covered in
lavout EA.
29
29
2 q
30
30
30
30
30
30
Apology
We regret that, due to circumstances beyond our control, the layout
and design of this first edition of the Project 80 manual has been
rushed. We apologise for any resulting errors and inconsistencies
but if you have any comments, criticisms or suggestions the author
will be pleased to consider these when the next edition is reprinted.
Introduction
This manual describes Project 80 high fidelity modules for the home
constructor. Part One deals with some complete projects for the
home constructor and gives a pictorial layout of each, with a
shopping list and details of some suppliers. Layout AE deals with
Project 805 specif ically.
T h e b e g i n n e r i s s t r o n g l y r e c o m m e n d e d t o f o l l o w o n e o r o t h e r o f
these projects exactly, but the rest of Part One gives additional
information on complete systems and hints for those who wish to
depart from the suggested layouts.
It is not possible to list all the pitfalls that can occur but if
commonsense is used and the hints are followed, even the complete
beginner will be able to assemble his project into whatever case or
system he wishes - and he will get excellent results first time.
W h e n w i r i n g t h e m o d u l e s , y o u m a y f i n d i t h e l p f u l t o c o l o u r t h e
w i r e s o n o u r l a y o u t s . F o r i n s t a n c e , y o u c o u l d c o l o u r a l l t h e w i r e s
connected to the power supply + ve in red and say to the -ve in
green. There will then be far less chance of a mistake when wiring.
S e c t i o n 4 6 i s a b o u t f a u l t f i n d i n g - j u s t i n c a s e y o u d o m a k e a
m i s t a k e i n a s s e m b l y , o r s o m e t h i n g g o e s w r o n g . l t i n c l u d e s a
step-by-step chart which will help you find most likely faults.
P a r t T w o o f t h e m a n u a l d e a l s w i t h t h e i n d i v i d u a l m o d u l e s ,
u n i t - b y - u n i t . l t g i v e s c i r c u i t d i a g r a m s , p e r f o r m a n c e a n d t e c h n i c a l
i n f o r m a t i o n , a s w e l l a s l i s t i n g m a n y i n t e r e s t i n g a n d u s e f u l a p p l i c a -
t i o n s f o r t h e i n d i v i d u a l m o d u l e s .
S e c t i o n n u m b e r i n g
By its very nature, a modular system is flexible -
new modules
a r e a n n o u n c e d f r o m t i m e t o t i m e . T h i s m a n u a l i s t h e r e f o r e p l a n n e d
so that there is a logical place for information on new modules. The
manual is also laid out so that as far as possible it is in the order you
want it -
the first thing you will want is to assemble your new
system -
so the practical projects come first. Only if you are
departing from one of these will you need the rest of Part One (with
t h e e x c e p t i o n o f S e c t i o n A 1 w h i c h d e a l s w i t h m o u n t i n g t h e m o d u l e s ) .
Part Two is numbered as consistently as possible so that Sections
B A 2 , B B 2 , C A 2 , e t c . a r e a l l c i r c u i t d i a g r a m s , w h i l s t B 8 6 , C B 6 , D B 6
are all information on power supply requirements. Where two
m o d u l e s h a v e c o m m o n i n f o r m a t i o n , e . g . t u n e r a n d d e c o d e r , w h i c h
h a v e i d e n t i c a l p o w e r s u p p l y r e q u i r e m e n t s , r a t h e r t h a n i n c l u d e t h i s
information twice as 846 and B86, it is included as Section 86
there are no Sections 8,46 or B86.
240 and 260 have much common information included in Sections
D5, D6, D7 and D10. The power supplies PZ5 and PZ6 are very
similar so that common inforrnation on these is included as EAr'EB
when it does not include the PZ8.
Modules Available
The following list shows all the modules which are available, or
projected, at the time of printing. The modules are grouped into four
sections lettered to coincide with Part ll of the manual: B signal
sources, C preamps and control units, D power amplifiers E power
s u p p l i e s a n d F o t h e r m o d u l e s .
Advertisement
