Glenn, again, to convert your Knight T-50 to include phone would not be cost effective at all. It was clearly not designed to be used that way. It takes much more than just a microphone. It takes some type of modulator. If you had a modulator, you would need a microphone to plug into the modulator. I don't think you can even purchase separate modulators any more like what you would need. I built one many years ago for another type of transmitter, and even back then, it cost me around $30 to build, and that was when the parts were readily available. Today, it is even difficult to purchase the parts you would need. My company, Millitronics, has trouble locating parts even to purchase in large quantities. 

Glenn, that Knight transmitter you have has one very important, but pretty serious flaw in its design that you need to be aware of. When you plug the code key into the key jack, there is around 150 D C volts across the terminals of the key, and if you accidentally get your fingers or hand across those terminals, you will get a shock. It probably isn't enough to seriously hurt you, but it is enough to definitely get your attention. 

Ron, K8HSY

-----Original Message-----
From: Glenn / Lenny [mailto:[log in to unmask]] 
Sent: Monday, June 01, 2015 9:59 PM
To: [log in to unmask]
Subject: Re: voice over a CW rig

Hi Ron,
It came through well.
I greatly appreciate your efforts in getting the information.
It will make my use of it much easier.
I think I will need a receiver to listen in on my attempts at CW.
I think the voice option might be too much of a challenge, unless it would not be difficult to make a microphone, since I have home obligations that come first.
I have a feeling such a microphone will take a lot of study to get working.

Glenn
----- Original Message -----
From: "Dr. Ronald E. Milliman" <[log in to unmask]>
To: "'Glenn / Lenny'" <[log in to unmask]>
Cc: <[log in to unmask]>
Sent: Monday, June 01, 2015 9:54 AM
Subject: RE: voice over a CW rig


Good morning, Glenn, below is the edited version of the Allied Knight Kit 
T-50 Transmitter users' manual that I tried to send you last night. This 
time I am sending it to you directly and not trying to send it through the 
Blind Hams' email list. I think when I send it to you directly, it will come 
out just fine. Let me know how it comes out on your end. I am also going to 
attach the version I formatted for you too.

***###***


Allied knight kit

50-WATT TRANSMITTER

This is a Crystal controlled, 50 watt input CW only transmitter. It utilizes 
a 6AG7 oscillator and a 807 RF amplifier and a 5U4 rectifier.

OPERATING YOUR TRANSMITTER

GROUNDING

The pi-network type of output circuit requires a good earth ground to the 
transmitter chassis for efficient antenna loading. The screw on the rear of 
the chassis should be connected to a heavy gauge copper wire which should go 
by the shortest path possible to a water pipe or a metal rod driven eight 
feet or more into the earth.

If, after the transmitter is loaded into an antenna, the chassis is "hot" 
with RF, as indicated by a change in plate current when the keyed 
transmitter is touched, then the ground circuit must be improved.

ANTENNAS

A well designed antenna with a relatively flat, unbalanced transmission line 
can be easily loaded by tuning the transmitter according to the 
instructions; assuming that the transmitter chassis is well grounded and 
that the impedance of the antenna is within the range of the pi network. 
With the transmitter chassis grounded it may be possible to feed a balanced 
transmission line if the line is more than %-wave long.

Since the complete subject of antennas is too broad to be covered in this 
manual it is suggested that other books, such as the ARRL handbook, be 
consulted if more information is desired.


CRYSTALS

The following table lists the crystal frequencies which may be used for full 
output on the bands indicated.

CRYSTAL BAND 80 3.5MC 40 -- 20
--
  40 7.0MC 20 15 - - 10


PREPARATION FOR TUNING

1. Connect the chassis to a good ground.

2. Select the output frequency desired and plug an appropriate crystal in 
the XTAL socket, or plug an adequate variable frequency oscillator in the 
VFO socket.

3. Connect the antenna lead to the antenna socket.

4. Insert the telegraph key plug into the KEY socket.

CAUTION: With the ON-OFF switch in the ON position up to 150 volts is 
applied to the telegraph key terminals. Turn the power OFF before adjusting 
the key.

5. With the ON-OFF switch in the OFF position, plug the line cord into a 117 
volt AC power outlet.

6. Turn the BAND knob to the desired output frequency.

7. Turn the LOADING knob to the full counter clockwise position and put the 
MIN-MAX switch in the MIN position.

It is possible to get more than one indication of resonance when rotating 
the OSCILLATOR TUNING and AMPLIFIER TUNING knobs on the higher frequency 
amateur bands. Some method must be used to make sure that the desired output 
frequency is being produced. Listening to a receiver with its antenna 
disconnected will help identify the output frequency. An absorption 
wavemeter or a grid dip meter also will help to insure proper tuning.

If you want to use a VFO for code transmission, the Transmitter itself must 
be keyed and not the VFO.
When the KEY jack contacts are shorted the Transmitter must have excitation 
(a good crystal must be plugged into the XTAL socket or an appropriate 
signal must be fed to the VFO socket), or the plate and screen dissipation 
ratings of the 807 will be greatly exceeded.

18

As soon as the ON-OFF switch is pushed to ON more than 700 VOLTS appears 
both above and below the chassis. BE CAREFUL.

TUNING PROCEDURE

1. Put the ON-OFF switch in the ON position.

2. If the key has a shorting lever, open it.

3. Put the METER switch in the GRID position.

4. Allow one minute for the tubes to warm up. Note:
The meter will not deflect unless the key is pressed.

5. Close the key and turn the OSCILLATOR TUNING knob for a 3 to 4 ma grid 
current, not maximum, reading on the meter (with the METER.
switch in the GRID position).

NOTE: Do not hold the key down for more than a few seconds without having 
the AMPLIFIER TUNING adjusted or "dipped", for resonance as indicated by a 
MINIMUM on the meter with the METER switch in the PLATE position.

6. Close the key and adjust the AMPLIFIER TUNING for a minimum on the meter 
with the METER switch in the PLATE position.

7. Load the antenna by turning the LOADING knob toward INCREASE in small 
amounts and immediately retuning the AMPLIFIER TUNING to a minimum on the 
meter. Turn the LOADING knob toward INCREASE until the "dip" in plate 
current found by adjusting the AMPLIFIER TUNING knob is about 100 to 110 
milliamperes. As the LOADING is increased, it will be found that the "dip" 
in plate current becomes less pronounced; this indicates power is being 
delivered to the load.
The transmitter is ready to operate. If the proper current of 100 to 110 ma. 
is not reached with the LOADING knob all the way clockwise turn the knob 
fully counterclockwise again and put the MIN-MAX switch in the MAX position 
and start the LOADING procedure over again.




Dr. Ronald E. Milliman
Retired Professor of Marketing