IPN 220-01159-01
M850-00
T859 PCB Information
D5.3.3
Copyright TEL 31/09/98
T859 Parts List (IPN 220-01159-01)
How To Use This Parts List
The components listed in this parts list are divided into two main types: those with a circuit reference (e.g. C2, D1, R121, etc.) and
those without (miscellaneous and mechanical).
Those with a circuit reference are grouped in alphabetical order and then in numerical order within each group. Each component
entry comprises three or four columns: the circuit reference, variant (if applicable), IPN and description. A number in the variant col-
umn indicates that this is a variant component which is fitted only to the product type listed. Static sensitive devices are indicated by
an (S) at the start of the description column.
The miscellaneous and mechanical section lists the variant and common parts in IPN order. Where possible, a number in the legend
column indicates their position in the mechanical assembly drawing.
The Parts List Amendments box below lists component changes that took place after the parts list and diagrams in this section were
compiled. These changes (e.g. value changes, added/deleted components, etc.) are listed by circuit reference in alphanumeric order
and supersede the information given in the parts list or diagrams. Components without circuit references are listed in IPN order.
Parts List Amendments
C6 (Hi Band) 100n mylar capacitor and 10e resistor added in series across C6 to improve low power stability and
eliminate 3MHz instabilities (710294).
C11 & C12 (Hi Band) 10p added across base & emitters of Q3. To ensure adequate drive power on hi band versions (90/08-
390).
(Hi Band) deleted to improve low power stability and eliminate 3MHz instabilities (710294).
C22 (Low Band) changed from 100p (015-03100-02) to 33p. To eliminate instability & improve power out (90/01-023).
(Mid & Hi Bands) changed from 100p (015-03100-02) to 22p. To eliminate instability & improve power out (90/01-
023).
C23 (Low Band) changed from 47p (029-02470-02) to 27p. To eliminate instability & improve power out (90/01-023).
(Hi Band) changed from 47p (029-02470-02) to 39p. To accommodate power variations across the band (89/10-
547)
(Mid & Hi Bands) changed from 39p (029-02390-02) to 18p. To eliminate instability & improve power out (90/01-
023).
C24 (Low Band) changed from 39p (029-02390-02) to 22p. To eliminate instability & improve power out (90/01-023).
(Mid Band) changed from 39p (029-02390-02) to 18p. To eliminate instability & improve power out (90/01-023).
(Hi Band) changed from 33p (029-02330-02) to 18p. To eliminate instability & improve power out (90/01-023).
C27,C43 & C47 (Hi Band) changed from 33p (029-02330-02) to 27p. To accommodate power variations across the band (89/10-
547)
C28 & C49 (Mid & Hi Bands) changed from 33p (029-02330-02) to 27p. To eliminate instability & improve power out (90/01-
023).
C27, C28, C42
C43, C47 & C49
Changed from mica case type to ceramic chip type. All values remain the same. To eliminate 3MHz & 90MHz
instabilities (95/08-7040 & 96/07-7106)).
C42, C43, C47
& C49
(Mid Band) changed from ceramic chip to cased mica. All values remain the same. To improve power output and
reduce excessive heating around the collectors of the final transistors (710656).
C69 10u added. To eliminate instability & improve power out (90/01-023).
C70A 100n added. To eliminate instability & improve power out (90/01-023).
C80 & C86 150p deleted. To prevent 800kHz instability (93/03-155).
C102 150p deleted. To prevent 800kHz instability of Q15 & Q16 (95/08-7040 & 96/08-7113).
C130 & C131 150p added. To eliminate instability & improve power out (90/01-023).
IC4 LM317L added. To eliminate instability & improve power out (90/01-023).
L18, L35 & L38 Changed from coil 1.5T/8.0mm (052-08180-15) to Inductor Hairpin 10mm Tall (89/10-566).
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