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From: wa2ise
Newsgroups: rec.radio.amateur.misc

Subject: TS180s notes (long)

Message-ID: <1991Dec8.191700.28212
Keywords:ts180

Sender: news
Organization: AT&T Bell Laboratories

Date: Sun, 8 Dec 1991 19:17:00 GMT

Lines:277





The following is a series of notes on the TS180s

copied from packet:



 Msg# TSF  Size #Rd  Date  Time From   MsgID        To

 8510 BF   1757   0 01-Dec 0554 KD2EJ  27819_WB2QJA INFO
 Sb:TS-180S USE W/LINEAR AMP.



SB-817



TS-180S Use with a Linear Amplifier                        3-20-80



1.   Fast Protection with a Linear:



     For complaints of fast protection, such as when operating CW semi-

break-in with a linear, check C73 at the base of Q1 on the LPF unit X51-

1180-00.  If it is a 1uf, change to 3.3 uf, 25v or greater.  This will

compensate for slow linear relay closure.



2.   Premature Protection

    

     The radio should protect at 3:1 SWR, or at 24W open (no) load.  To

test the protection circuit, load the radio at 24W into a know 500 ohm

dummy load through a Bird 43 wattmeter.  Disconnect the load from the

wattmeter.  The protection light should just lite.  Adjust the protection

pot VR1 on the LPF unit for protectio at 24W with no load.



3.   For complaints of VOX CYCLING, MEMORY JUMP, READOUT JUMP, or TONE

"BEEP" at key up or down with a linear amp, suspect linear induced relay

transients entering the radio via the ASSY relay wiring.



     For example, DRAKE L4B linears before Serial Number 5500 do not have a

quench diode across the DC operated relay.  Install a 1N4005 or equivalent

across the relay in the linear to eliminate the back EMF induced by the

linear into the TS-180S.  Similarly, Henry linears also don't have a diode

across the relay and may give these symptoms when operated with a TS-180S.



JEB/yn

© 32080TKC



SB-803



TS-180S CW Delay During VOX Memory Operation                 2-7-80



Some operators may report missing the first dit during CW VOX operation on

the memories.  This will occur only in early units, and may be improved by

changing one capacitor in the DFC.



On the DFC VCO unit X50-1550-00, check C3 at the base of Q3.  If C3 is a

22uF electrolytic, change to a .01uf disc.  No adjustments are necessary.



JEB/yn

© 2780TKC



SB-055



TS-180S Low 40M ALC               9-14-79



 Please annotate your service manual.



Some operators may experience intermittent reduction or loss of ALC,

especially after several minutes transmit time.



On the LPF unit X51-1180-00, change C14, C17 from 470 pf to 390 pF.  Check

ALC level and adjust if necessary, per section 406 ALC meter adjustmet, TS-

180S service Manual.



New part: CM93D2H390J 390pF +/- 5% 500v mica or ceramic



Please annotate your Service Manual.



JEB/yn

© 91479TKC



SB-839



TS-180S VFO Stability                       12-29-80



VFO drift characteristics may be improved by changing a capacitor value and

location in the VFO.



1.   Begin by calibrating the analog dial to the Digital Display at

14.000.0 MHz.  DO NOT disturb this calibration while working on the VFO.



2.   Turn off the main power and remove the VFO unit by two 3mm hex head

bolts.



3.   Withdraw out the front panel and unplug the leads.



4.   Remove the VFO cover by five Phillips head screws.



5.   Remove C17 from the PCB.  This may be cut flush to the board.



6.   Install the 18 pF yellow cap across the tank coil terminals.  Position

the cap near the coil.



7.   To reassemble, performs steps 3, 2.  Snug all VFO case screws.  A

later complaint of frequency jump would indicate a loose VFO shell.



8.   Turn on the radio and check analog dial calibration against the

Digital Display.  Adjust VC1 (center of the Seal Tape) only if the zero-

point has moved.



9.   VFO linearity final check: The Digital readout and analog dial should

agree to within +/- 2 kHz at every 100 kHz dial point.





New Part:18 pF CC45RC1H180J

Old Part:18 pF CC45PG1H180J



Analog Dial Calibration



1.   Calibrate the main knob to 50 kHz analog against the digital display.



2.   Note the digital error.  If it is more than 2 kHz adjust the VFO

trimmer cap VC1 (center under the sealing tape) to exactly 50.0 on the

digital readout.



3.   Turn the main knob to 450 analog.  If the digital error is less than 2

kHz it is in spec.  If the digital error greater, proceed:



     For instance, if the digital error is 14.454.0 (plus 4 kHz), multiply

the error times 4 (16 kHz) and adjust the VFO trimmer cap to the desired

frequency (14.450.0) LESS the error, or 14.434.0.  Next, adjust the VFO

inductor L1 (front under the sealing tape) back up to the desired frequency

of 14.450.0.



4.   If the error in step 3 was in the minus direction, reverse the

direction of correction adjustment.



5.   VFO linearity final check: The digital readout and analog dial should

agree to within +/- 2 kHz at every 100 kHz dial point.



JEB/yn

© 122980TKC



SB-047



TS-180S Increase of RX Audio Output                7-30-79



RX audio output from the TS-180S may be increased a total of 4.7 dB.  This

is an optional change which you can make at the owners request.



On the IF unit X48-1240-00 change components:



     R206  2.2K change to 1 K ohn

     R207  2.2K change to 4.7 K ohm



On the AF Gain Control, between pin 1 and 3;



     C4 .047uF change to .027uF mylar



Please annotate your service manual.



JEB/yn

© 8679TKC



SB-042



TS-180S IF output #2 Level Change for SM-220                9-4-79





TS-180S owners who desire to operate an SM-220 for IF output display will

require a wiring change to the IF unit X48-1240-00.  No additional parts

and no adjustments are required.



Remove R77, 470 ohm, and replace with wire jumper.  Remove R78, 56 ohm, and

replace with old R77.  The 56 ohm resistor is not used.



With AGC on, gain should be adequate for about a 3/4 screen display.





JEB/yn

© 71079TKC



SB-041



BS-8 Alignment with the TS-180S Transceiver                9-4-79



     The SM-220/BS-8 scope combination are fully compatible with the TS-

180S transceiver.  However, as the TS-180S does not have a 25kHz

calibrator, BS-8 alignment will not be in accordance with the SM-220

Operating Manual.



Procedure:



Install the BS-8 in accordance with the SM-220 Manual, however, leave the

scope covers off until step 1 is completed (If input alignment.)  See note

1.2.



Perform steps 8.4.1, 8.4.2. steps 8.4.3, 8.4.4 do not apply to the TS-180S.

After step 8.4.2. continue:



1.   With the Marker ON, turn the transceiver ON, and in the USB mode, any

band, you should hear the scope Marker directly injected into the IF.

Peak T201, the BS-8 input IF transformer, for maximum signal into the TS-

180S.  This transformer is not shown in Fig. 8-2, but is the only other

adjustment on the BS-8, and is located below the three identified sccess

openings.  If you cannot hear the Scope Marker in the TS-180S, turn the

marker off and tune a local station on the 1.5 MHz band.  Peak the drive

control, and then peak T1 in the BS-8 for maximum amplitude at scope center

and equal roll-off at the display edges.  See note 1 Page 2.



2.   Turn of TS-180S, 1.5 MHz band, and tune to the local AM broadcast

station nearest 1.6 MHz.



3.   Enter this frequency in the M1 Memory.  Depress the DSP/Diff

pushbutton for a differential display.



4.   Tune up and down approximately 100KHz, observing the scope display.

Note the verticale displacement of the original frequency to the left and

right.  If equal, or linear displacement is obseved, stop.



5.   If the display does not shift equally when tuned up or down frequency,

adjust VR202 for linearity of scan width.  Then reset to the center

frequency (by the cope Marker or retuning the transceiver).  Reset TC201 if

necessary.  Repeat two or three times for correct scope center frequency,

and linear display.



6.   Turn the TS-180S off, and the scope marker on.  Switching between

100khz and 20khz scan widths, the marker should appear at scoep center, and

should not shift.  Repeat step 5 if there is a shift.



Notes:



1.   A Bs-8 previously aligned to a TS-820 or TS-820S need only have step  

     1., input alignment, performed.



2.   Preset TC201, VR201, VR202 at their center.  When alignment is

complete, these adjustments should not be at their extreme limits.  This

will result in unstable Pan display operation.  Rather, they should be

somewhat within their center range.







Please make these changes in your service manual.



JEB/yn

© 9479TKC



SB-061



TS-180S Trouble Sheet                12-18-79



ALC deflection low   Replace D21 on IF unit from 7.1 to 9.0V zener.

Readjust all ALC pots.



IF #2 OUtput low   Bridge R77 position, replace R78 with R77 470 ohms.  See

TKC service Bulletin.



RX Noise (OSC CAR leakage)   Shorten L31, L33 leads as much as possible.



Increase NB effectiveness   Replace L31, L33 for 33 uh to 27uh, with SHORT

leads.



RX noise from strong signals   Replace L30 10uh on the IF with self

shielding type (new part L40-1035-21).



TX audio distortion   Adjust T15 on the IF approx 1/2 turn back, readjust

all ALC pots up.



10 M PLL unlock   change: R77 from 6.8 K to 4.7 K ohm, R94 from 8.2 K to

6.8 K ohm on the PLL unit.



TX audio distortion   Adjust 10 W bias for 150ma, 100w bias for 100ma.



Unlocked all bands   Check L2, (Q2 B+) in the PLL unit.



FM'ing with DFC   See service bullein of 9/10 for L12, L13 change and add

resistor and shield.



40 Mlow alc, See bulletin 9/14 change C14, 17.



JEB/yn

© 8979TKC

=============================================================================

Note:I havent tried or verified this, proceed at your own risk.  WA2ISE






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