More Heath Mods from QST

Tue Dec 23 11:59:18 EST 1997

HEATH MODS FROM QST
                           1950s-1960s
           MANY THANKS TO BILL COLEMAN, AA4LR, FOR THE BOOKS

AC-1 Antenna Coupler

Series or Parallel Tuning with the Heath AC-1, Dec 58, 68-71.

AM-2 SWR Bridge

1.  Using the Heathkit AM-2 Reflected Power Meter as a Modulation
Monitor, Mar 59, 52-55.
2.  Building a Transmatch into the Heath SWR Meter, Jan 66, 20.

AT-1 6-Band CW Transmitter

1.  Modifying the Heathkit AT-1 Transmitter for Operation on 160-meters,
Jun 56, 76-77; 156.
2.  Economy Modulation for the Heathkit AT-1, Nov 56, 36.
3.  Putting the AT-1 on 50-mHz, May 57, 22.

DX-35 Transmitter

Improved Control Circuit for the DX-35, Jun 58, 71-73.

DX-100 Transmitter

1.  Notes on the Heathkit DX-100 Transmitter, Jun 56, 76-77; 156.
2.  Additional Keying Hints for the DX-100, Feb 57, 59 and Feedback, Mar
57, 54.
3. DX-100 Keying, Feb 58, 67-69.
4.  DX-100 Keying, Feb 58, 69.
5.  DX-100 Audio Change, Nov 59, 55.
6.  Correcting Wrong-Way Grid Current in the Heathkit DX-100 and Apache
Transmitters, Jun 59, 60-63.
7.  DX-100--SB-10 Mod, Aug 59, 53 and Feedback, Sep 59, 88.
8.  Diode Time-Sequence Keying for the DX-100, Apr 59, 35.
9.  Improved Keying and Drive for the DX-100, Feb 60, 48-51.
10. Correcting High Modulation Standby Current in the DX-100, Aug 62,
56.
11.  DX-100 High-Voltage Rectifier Arcing, Jul 64, 80-81.

HA-1 Keyer
1.  Break-in Monitoring with the HA-1, Dec 66, 35.
2.  Preventing the HA-1 Keyer from Generating Spurious Dots, Oct 68, 45.

HA-10 Warrior Linear Amplifier

1.  Heathkit Warrior Notes, Dec 61, 62-63.
2.  Heathkit Warrior Mods, Feb 62, 33.

HD-10 Keyer

1.  HD-10 with an External Paddle, Sep 68, 51.
2.  Improved Performance from the HD-10, Feb 68, 56.

HW-31 Cantenna

Cantenna as an RF Wattmeter, Dec 65, 29.

HP-23 Power Supply

Using the HP-23 with the HW-12 and the SB-100, May 66, 75.

HR-20 5-Band SSB/CW Receiver

HX-20 and HR-20 Dial Pointer, Jun 66, 74.

HW-12 80-Meter SSB Transceiver

1.  Using the HP-23 with the HW-12 and the SB-100, May 66, 75.

2.  Equalizing the Low-Voltage Requirements of the HW-12 and the SB-100,
Dec 66, 49.

3.  HW-12 Rattle, Dec 66, 49.

4.  HW-12 Carrier Null Adjustment, Sep 68, 51.

HW-20 Pawnee 2-meter Transceiver

Pawnee Notes, Aug 64, 64-65.

HW-29 "Sixer," 6-Meter AM Transceiver

1.  Notes on the Heath "Sixer," Oct 60, 50-51.
2.  Final Tuning Knob for the Heath "Sixer," Jan 67, 50.

3.  Some Useful Modifications for the Sixer and Twoer, May 68, 28.

HW-30 2-meter Transceiver

Some Useful Modifications for the Sixer and Twoer, May 68, 28.

HW-32 20-Meter SSB Transceiver

HW-32 Alignment, May 66, 74.

HX-20 5-Band SSB/CW Transmitter

1.  Improved CW Operation of the Heath HX-20, Mar 66, 44.

2.  HX-20 and HR-20 Dial Pointers, Jun 66, 74.

IP-27 Bench Power Supply

Heathkit IP-27 Low-Voltage Power Supply, May 68, 41.

GC-1 Mohican SWL Receiver

Improved Noise Limiter for the Mohican, Jul 62, 52-53.

Grid Dippers:  GD-1, GD-1A, GD1-B

The Heathkit Grid Dip Oscillator as a 144-mHz Transmitter, Jul 56, 146;
148; 152.

GW-30 Transceiver

Notes on the Heathkit GW-30 Transceiver, Feb 61, 48-49.

MM-1

Modifying the Heathkit MM-1 for Mobile Measurements, Aug 59, 50-53.

MT-1 Mobile Transmitter

Circuit Change for the Heathkit MT-1 Mobile Transceiver, Oct 60, 50-51.

QF-1 Q-Multiplier

1.  Variable Bandwidth for the Heathkit QF-1 Q Multiplier, Jan 64,
62-63.

SB-10

1.  Extra VOX Sensitivity for the Heath SB-10, Jul 59, 60-61.
2.  DX-100--SB-10 Modifications, Feedback, Sep 59, 88.
3.  Using the SB-10 with the Johnson Viking Valiant, Aug 60, 48-49.

SB-34

Improved Loading for the SB-34, Feb 67, 48.

SB-100

1.  Using the HP-23 with the HW-12 and the SB-100, May 66, 75.
2.  Equalizing the Low-Voltage Requirements of the HW-12 and the SB-100,
Dec 66, 49.
3.  Incremental Tuning for the SB-100, May 67, 49.
4.  SB-100 Mods, Nov 67, 40.
5.  SB-100 Improvements, May 68, 53.

SB-101

1.  Eliminating FM in the LMO of the SB-101, Oct 68, 44.
2.  Lowering the Pitch of the CW Monitor in the SB-101, Jun 68, 38.
3.  SB-101 Improvements, Nov 68, 50.
4.  Adapting the SB-101 for use with the SB-640 without Losing the
Crystal-Controlled Operation of the Transceiver When the SB-101 is used
Independently, Oct 68, 45.

SB-200

SB-200 Tip, Aug 67, 40.

SA-300

Transceive Modifications for the Heath SB-300/SB-400 Combination, Dec
66, 21.

SB-400

1.  Heath SB-400, Jul 65, 80-81.
2.  Transceive Mods for the Heath SB-300/SB-400 Combination, Dec 66, 21.
3.  Improved Spotting for the SB-400, Nov 68, 51.

TX-1 Apache 5-Band AM/CW Transmitter

1.  Apache Adjustments Made Easy, Mar 68, 48.
2.  Apache Transmitter Modfication, Nov 60, 54.

VF-1

1.  Using the Heath VF-1 to Drive the AT-1 on 15-Meters, Jun 59, 60-63.
2.  VF-1 Stabilizer, Mar 64, 64.

VX-1 Electronic Voice Control

1.  Modifying the Heath VX-1 for CW Break-In, Feb 59, 48-50.
2.  Adding Squelch to the Heathkit VX-1, Nov 60, 54-55.

Shawnee
Increasing the Heathkit Shawnee Spotting Signal, Sep 62, 62-63.

RF Probe
Diode Protection for the Heath RF Probe, May 68, 53.

That is all I have until I come into some more old QSTs.  I can't
retransmit any of this, so if anyone missed it, please look in the
archives at Tempe for December, 1997.

A great holiday season to everyone.  73, Keith

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