[Milsurplus] A couple of matters....

Fri Apr 14 13:55:07 EDT 2017

I have an operational TCK. I got it with a rather anemic homebrew power supply which I use for testing purposes, but lined up a couple of appropriate power transformers to rebuild it with to get the correct voltages. The power supply in its current state puts out only 1450VDC for the final plate - should be 1800 VDC and 350 VDC for the low voltage, which should be 500 VDC. This way the transmitter only puts out about 300 W instead of 400 W in CW. AM is a bit distorted because the 813's screen voltage is low so the operating point of the screen modulation is off from what it should be. 
Tuning is still very easy into 50 ohms (the final output is readily tunable into 50 ohms, that impedance is designed into the broad range of impedances).
On  CW, the key line has 150 VDC on it and to keep it safe, a small 12 V relay was added by a previous owner to keep the high voltage off the key. On AM the original push to talk circuit keys off 12 VDC, which also supplies the carbon microphone, so 12 VDC is available anyway from the power supply.
My TCK came to me unfortunately with the rotor wafers of the PA tank circuit band switch missing and the stator wafers cracked. I simply strapped the circuit to the band that covers the 80 m band.  I can't find a replacement because the indexing angle of the 7 position switch is non-standard so nobody makes any suitable rotary switches with that angle; the switch is ganged with the master oscillator and multipliers' bandswitch, for single knob bandswitching. I made a few contacts wit it on the air, but will set it in its place when the power supply is rebuilt, next to the operating desk where I have the RBA, RBB and RBC triplets. 

In my experience it is a very easy to set up and operate the TCK, provided a suitable power supply is built. The power supply is standard, no stacked voltages or floating negatives.

73, Meir Ben-Dror WF2U
Landrum, SC

⁣Sent from BlueMail On Apr 13, 2017, at 3:41 PM, howard holden <holden7471 at msn.com> wrote:

Hi Ken, Rob Flory K2WI runs (or ran) a TCK for a number of years. Might be a good resource for you. He's got a page on Nick England's Navy Radio site. Good luck with it.

73 Howie WB2AWQ 

Sent from my iPhone

On Apr 13, 2017, at 11:18 AM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:

which I hope some of you will find interesting.

1) So far, in my search of several places, including past issues of ER Mag, I find no defintive 
articles on putting the TCK on the air. I will receive "my" TCK-4 in late April and intend to 
begin working on it immediately.

Therefore, I'm going to do it on my own, although I think I'll prepare an article for ER Mag 
detailing my procedure. Some may find it of interest.

2) In the several tons of radio gear, mostly receivers, I received from the estate of an old 
employer with whom I worked in the 1970s, one particular receiver is, at least to me, 
extremely interesting! It is an all solid-state receiver of a type which was used, apparently, 
by the FBI. This receiver has no RF amp stage, but its specs are very high, and it uses a 
series of pie-shaped modules, each of which contains one frequency-determining unit. The 
band switch also mechancially rotates a large plate which can contain up to 12 of these 
modules. Thanks to someone on the ARC5 forum, I obtained a manual for this receiver 
which the seller found in a dump and rescued.

That receiver is in the queue to be restored, and I intend to write an article on it for ER Mag.

Later,

Ken W7EKB

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On Apr 13, 2017, 3:41 PM, at 3:41 PM, howard holden <holden7471 at msn.com> wrote:
>Hi Ken, Rob Flory K2WI runs (or ran) a TCK for a number of years. Might
>be a good resource for you. He's got a page on Nick England's Navy
>Radio site. Good luck with it.
>
>73 Howie WB2AWQ 
>
>Sent from my iPhone
>
>> On Apr 13, 2017, at 11:18 AM, Kenneth G. Gordon
><kgordon2006 at frontier.com> wrote:
>> 
>> which I hope some of you will find interesting.
>> 
>> 1) So far, in my search of several places, including past issues of
>ER Mag, I find no defintive 
>> articles on putting the TCK on the air. I will receive "my" TCK-4 in
>late April and intend to 
>> begin working on it immediately.
>> 
>> Therefore, I'm going to do it on my own, although I think I'll
>prepare an article for ER Mag 
>> detailing my procedure. Some may find it of interest.
>> 
>> 2) In the several tons of radio gear, mostly receivers, I received
>from the estate of an old 
>> employer with whom I worked in the 1970s, one particular receiver is,
>at least to me, 
>> extremely interesting! It is an all solid-state receiver of a type
>which was used, apparently, 
>> by the FBI. This receiver has no RF amp stage, but its specs are very
>high, and it uses a 
>> series of pie-shaped modules, each of which contains one
>frequency-determining unit. The 
>> band switch also mechancially rotates a large plate which can contain
>up to 12 of these 
>> modules. Thanks to someone on the ARC5 forum, I obtained a manual for
>this receiver 
>> which the seller found in a dump and rescued.
>> 
>> That receiver is in the queue to be restored, and I intend to write
>an article on it for ER Mag.
>> 
>> Later,
>> 
>> Ken W7EKB
>> 
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>> 
>> ______________________________________________________________
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>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
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