TW100F/AT Transworld Datron Fly Away H.F. Radio

&

TW100UL Table Top

Brooke Clarke 2012



Background
TW100 Fly Away
    Connectors
    DC Power Supply
    AC Power Supply
    Manuals
TW100UL Table Top
Related
Links

Background

TW100 Fly Away

This is a fly-away H.F. radio.  The idea is that it can be carried onboard an airplane and setup at the destination using either DC or AC mains power.  Works with a wire antenna by means of an included antenna tuner.  Very similar to the Harris RF3200ET Fly Away H.F. Radio.

This radio has two U-229 AUDIO jacks, but the one shown in the manual for the TW100F has only one U-229 jack and adds 1/4" jacks for phones and a key.  So there are at least two versions, and probably more based on which options are installed.
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio Inside view 1
TW100F/At Inside
                  missing screws & 2 broken wires
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio Inside view 2
The backup battery tests 3.3 Volts.
The A.C. power supply needs to be repaired.
The screws holding the near end of the incudtor stick came loose.
The two wires closest to the near end were broken at their solder
connections and have been repaired.
The PCB and 3 large can hold down screws (as well as the 4 inductor
stick bracket) screws were removed and reinstalled using
Loctite 222.
Removing the large screws from the top panel
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio Inside view 3

lifting up the AC power supply
TW100F/AT
                  Transworld Datron Fly Away H.F. Radio Inside view 4


Connectors

There are a couple of circular connectors on the front panel.
Accessory - threaded coupling, 14 socket contacts, core marked "20-27".  Cable conn: MS3106A20-27P(SR) 
12 Volts DC - threaded coupling, 4 socket contacts                                    Cable conn: CA3106E12S-A10P (This is an odd connector that Bill P. hand makes or is expensive)

DC Power Supply

The stock DC power supply is for "12 Volts" DC.  What is the mating connector?  Let me know.
A common car battery would work well.
There's an option for a "24 Volt" DC supply that would be compatible with military vehicles and some aircraft.
There's a warning in the manual to not use both the DC and AC supplies at the same time.  It may damage everything.

The UPF7000 Power Supply is rated 13.8 V @ 30 Amps and it's PCB looks similar to this one.  But instead of using TO-220 power devices it uses a couple of external boxed power devices.
I expect the technical info for this supply would be a big help in troubleshooting my AC power supply.
UPF7000 Power
        Supply

AC Power Supply

Dead, needs repair.  If you have any documentation on this supply let me know.

Uses the common IEC line cord.  Works with 50, 60 or 400 Hz and pretty much any line voltage in the world.  This radio does not have a selector switch for the line voltage, so the AC PS module is truly universal.  That solves the problem of selecting 115 VAC and plugging into a 230 VAC outlet and letting the smoke out.


Inside the AC Power Supply
TW100F/AT
                Transworld Datron Fly Away H.F. Radio AC Power Supply
Marked:
TWC 738168 Rev. A

Transformer marked:
TW100F/AT-006
W/.O 3514   Rev. B
ECN. 001  Seq. 01

Wiring Table

PCB
Wire
Component
External
Wire

E1
Brown
Filter
-

E7
Grn/Yel
Filter
-

E2
Brown
Fuse
-

E3
Blue
Fuse
-

E4
Org
Feedthru
white On/Off Switch
E5
Blue
"
Blue
On/Off Switch
E6
Blue
Filter
-



E8
Red
Feedthru Red
E8=E9: +
E9
White
"
Red
E8=E9: +
E10
Black
"
gnd
E10=E11: -
E11
Black
"
gnd
E10=E11: -

Connecting to the 115VAC mains - there is no DC output (with a jumper between E4 & E5).
BR1 shows 122 VAC and 355 VDC.

ESR-Cap Testing

No.
Marked
Meas
ESR
C6
680 uF 250WV
681
0.07
C7
680 uF 250WV 677
0.45
C15
3900 uF  16 VDC 9600
0.03
C16
3900 uF  16 VDC
9610
0.04
C28
470 uF  35 VDC
450
0.47
C33
100 uF  16 VDC
105
0.40
(R30)
470 uF  35 VDC 455
0.15
(R17)
330 uF  16 VDC
137.4
1.02

3 March 2012 - 330 uF @ 25V caps on order.  Replacing the cap next to R17 with a 330 uF 35V cap did not fix the power supply.
Maybe C15 & C16 have a problem since they show too much capacity?  Probably in parallel with other caps.

RF Amp Transistors

Replacement for D310050: SD1487
Substitute transistors: MRF422 or  SRF3503P

Manuals

I've found a couple of manuals on line.  But neither of them matches this radio nor includes info on the TW AC power supply.

TW100 Microprocessor Controlled HF SSB Transceiver, Pub No. 990101, Apr 1987, 319 pages - includes technical info

TW100F Fly-Away HF SSB Transceiver Operator's Manual, TW100F-MSOP Pub No. 990160, Sep 1990, 69 pages - is for a fly-away radio that looks similar to this one, except there is only one U-229 AUDIO connector and has jacks for headphones and a Morse key.  No technical info.

TW100F Fly-Away HF SSB Transceiver Technical Manual, Part No. TW100F-MS, Dec 1992, Rev H1 (3 parts combined = 216 pages)
The tranceiver covered has one U-229 audio connector and 1/4" phone jacks for a key and headphones.  My radio has two U-229 audio connectors and no jacks.
The tranceiver covered has a very simple AC power supply.  My radio has a complex AC power supply.

TW100F Fly-Away Transceiver Condensed Antenna Tuning Instructions, Pub. #990177, Nov. 1990 - seems to be for an antenna tuner that has controls.

TW100UL Table Top

This is a table top HF transceiver.  Note there is no provision to tune to a frequency, the radio only has channels.
Pressing "C" then two digits sets the radio to that channel.
Pressing "F" displays the frequency of the current channel.

Fig 1 Front
Transworld
                  TW100UL Table Top HF Transciever
It's not clear if the 1/4" jack is for a mike or speaker.
Fig 2 Label
Transworld
                  TW100UL Table Top HF Transciever

Fig 3 Rear
Transworld
                  TW100UL Table Top HF Transciever
It's not clear what the purpose or pinout is of the DB-9 connectors:
J3 (yel)
J4 (red)
J8 (yel)
J9 (blu)
and Moxex connector (model No.?) for 13.6 VDC power.
Fig 4 Audio Connectors
Transworld TW100UL Audio Connectors
Mike 4-Pin Connector to make cable:
Mouser Part Number: 502-09CL4MX
Fair Radio Item 8817

TS100UL Desktop HF Radio Microphone Connector

Adapter Cable: TW100UL - U229
Adapter Cable
                  TW100UL HF Mike to U229

Fig 5 Top Inside
Transworl
                  TW100UL Table Top HF Transciever

Fig 6 Bottom Inside
Transworl
                  TW100UL Table Top HF Transciever


The memory coin cell battery is at 3.043 V which is like new.

Manual

TW100 Microprocessor Controlled HF SSB Transceiver Operators Manual, Publication #990139, December 1984

GM Delco mobile mike

Got a GM Delco mobile mike from Fair Radio in the hopes it would fit one of these radios, but alas it does not fit either of them.
The connector has 5 male pins.
The OD of the black mating tube is 0.519 and it's ID is 0.437"

GM Delco mobile mike Connector Pin Out

Violet
Gray
Orange
Green
Ground

Vio & Gry:  PTT

GM Delco mobile mike



Related

Harris RF 3200ET Fly Away H.F. Radio
TW7000F Flyaway HF Tranceiver
ICOM IC706 Mk II G
ICOM R7000
NRD545 Receiver

Links


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page created 29 Feb 2012.