My apologies, but for the ones who wanted to know what the
controls were on the radio this is the only way this old man knows how to
explain it.
TR/REC
dual color LED, (3 legs), Red/Green for transmit and receive wired to the
transmit switch using 550 ohm on the positive lead which goes to on off switch
and 1.5K ohm on the green negative leg of the led, no resistor on the red
negative leg of the led. I had the board mounted already and needed to find a
way to hook up a dual color led without soldering to the relays.
Hence:
¡°Give the hardest job to the laziest person and he will find the easiest way¡±,
Single
led, red for eye candy VU , it pulses dim and bright with the strength of
signal coming from the sound output . It kind of looks cool listening to CW. Using
pnp transistor and 1K pot and 100 ohm resistor. Works very good, still not up
to my standard, needs improvement.
PA
power,
There
are two12 V jacks in the back of the radio, one is connected to the radio on
off volume control switch and the other goes to a pushbutton on-off switch and
from there to the PA /Volt switch. The PA volt switch is DPDT.
DPDT
Switch: The two top terminals are positive and negative coming from the volume
control on off switch, the bottom two terminals come from the DC to DC step up
converter and the two middle terminals of the switch go to the PA connection on
the board.
?I have installed a DC step up converter, 12 to
32 V, I removed the 10K micro potentiometer from the step up converter and wired
in a 10K potentiometer below the voltmeter, this allows me to adjust and
monitor the voltage going into the PA, when the switch is in the up position. When
the switches in the down position the voltage comes from the main power input
to the radio.
?I have a problem, it creates a motorboat noise
when hooked up to the same power supply so I added another Jack in the back to
go to the PA switch using a 12 V battery, then the noise is virtually
eliminated. I¡¯m using an inexpensive Chinese DC step up converter, I need to
get a good one hopefully that would eliminate the problem. Thought for the
future.
For
tuning I use a 10 turn potentiometer in place of the one that came with the
kit.
There
was a modification to reduce the brightness of the LCD display, instead of
installing a resistor of greater value I installed a 1K potentiometer with a
100 ohm resistor in line as suggested by another ham so I wouldn¡¯t overload the
LCD now I can adjust the brightness for nighttime or from outside in the
daylight.
There¡¯s a great deal going on eBay right now for two 8 ohm
speakers nice size magnet and they sound great, just a little¡¯s over six
dollars for two of them shipped, here¡¯s the link check it out;
?I used a 2 ? inch hole saw, wish I had a
3 inch.
I
attached a grill cloth first, then part of the screen from a screen door, added
protection, and then the speaker. I attached the speaker to the Jack in the
front so when you put on headphones it disconnects the internal speaker.
?
The
frequency display was only off 1 kHz which was easily calibrated per
instructions by just grounding the red wire coming from the eight pin connector
on the LCD.
On
February 18 at 1 AM in the morning using approximately 4 ? to 5 W output power,
(I didn¡¯t have the step up converter installed yet ) from my QTH which is approximately
17 miles southwest of Walt Disney World, I made contact with WY7KY?
?CHEYENNE, WY, ? W9EEE ?Columbia City, IN ? and?? K4RVM ? Louisville, KY . I was given great signal reports between 55 and 57 and
they said my Audio was excellent and they could not believe it was a QR P radio.
Needless to say they wanted to know more about it so I email them all the
information. This is a kit everybody will fall in love with.
? 73s and God Bless
????????????? Eddie kj4fgi
?
?
