Portable Field Radio

Hendricks QRP Kits
Affordable QRP kits at exceptional value

3 Band Portable Field Radio

Designed by Steve Weber. KD1JV

Specifications:

Bands : 40 meters, 30 meters and 20 meters
Tuning range: Full band coverage
Mode: CW only

Receiver MSD: 0.2 uV typical
Selectivity : 300 Hz
Receive current, no signal typical:
Active, 47 ma
Idle, 34 ma

Transmitter:
5 watts at 12 volts, all bands
Spurs: - 50 dBc maximum, all bands

5 to 35 wpm internal iambic keyer
Two (2) 63 character keyer memories.

Coax or balanced line output
Built in BLT (balanced line tuner)

Size: 7.3" long, 4.4" wide, 1.6" high. (18.4 x 11 x 4cm)

Power supply voltage: 8 volts minimum, 12.5 volts maximum. 12 to 9 volts recommend.

Supporting Files and Documents

PFR Production Manual Rev B

PFR Paddle Assembly Manual

Errata

Below is a list of issues that have come up by our builders.

There are two caps marked C48 on board with different values. One is between the phone and paddle jack and the other is just below U9. Note that the cap between the phone and paddle jack should be C30 (.01 UFD)
The color coding in the instructions for R6 and R7 are incorrect and should be orange orange yellow instead of red red orange.
The 4.7pF cap may have been replaced by a green 5pF cap with a black dot. Either will work.
Some of the electrolytic caps call for 16V parts. 25V parts may have been shipped, again either will work.
In the section on the Low Pass Filters it calls for a 33 pfd cap to be installed. This should be a 22 pfd.
In the Group 2 assembly, C26 .1 ufd should be installed with C25 and C28

In the News

Ken Evans, W4DU has written a wonderful review that was published by ARCI in the QRP Quaterly newsletter.