[600MRG] Converting rigs to 630m

[Dave Riley]

Well Howdy, Mr. Goody, K3NG

All good advice I see coming your way there.
Why not use an IC-735 or something like that which hasn't been ruined as your all mode input to the cathodes of your original CW rig?
Plug in a 10 Mhz Xtal in to your old CW rig oscillator chain to start off with and then switch to a high precision 10Mhz source later.
If your junk box jewell doesn't have 30m then start with the switches in the 40m band and adjust tuning upwards internally till you have output on 30m.

Once you have the rig running on 10Mhz then you are clean and clear to start the next logical move.

Run your version of the IC-735 on to 10.474200 in CW mode up to just a few watts of output and then scab it in to the cathode circuit of your prized veteran CW rig. In a jiffy you will have the first part of your new transmit converter finished.
You could even use a Heathkit DX60. Anything like that.
Then get ready to make a rough idea of installing an L network in order to feed the cathodes of the CW rig.
Then make ready to key a few watts of 10.474200 to the new cathode arrangement.

Part one is now completed. No power on yet.

Stop here and install a larger RF choke in the final plate circuit maybe 4mh or greater in place of the original.
Replace the tank circuit inductor with something like a 100 microhenry value +/- ( good Q ) and then increase the plate tuning cap to about 1 nanofarad ( .001 ) this can be done by using the original plate tuning cap in place and just adding about 900 pf. in parallel.
Then it should plug and play. Have tried that on many rigs here in the past including an Ameco 6 and 2 transmitter, made 35 watts out, A P and H 2 meter transmitting converter for about 60 watts out, and a Johnson Viking 2 transmitter, WOW. Talk about high level mixers.
Same thing for 2200m or even 4000m only larger and larger L/C values. It works well and I still have my original store bought radio that still works fine too, recently I graduated in to the big time with a IC718, very accurate and stable... Also went through a few 'transverter' gigs with the IC706 which saw hundreds of hours service on the high seas using ham bands as well as commercial frequencies, shhh, don't noise that around.
Then the IC706 went to 10ghz, and to 474thz laser band, trust me that 735 will go anywhere but please don't try to improve the innards as it was already been well engineered for 160-10m.
You are going to have so much fun. It will be like having a new novice class license all over again only with general class schmarts.

* Oh, an old tired blown out Heathkit SB200 will make 20 watts easy erp on 630m but that is outlawed right now.
** Oh again, an ARC-5 transmitter from 10 Mhz. era is a breeze, a natural, an overnighter gig in fact... 8.1-11 mhz? I forget.
*** A fellow Knight of the Mystic Sea in the person of Hashtafisti Scratchi, CQ Magazine emeritus spoofer is behind all of this.

You go for it Mr. G and we'll be QRV fer sure!! This has all been cleared with Hon. Ed. @ CQ Magazine along with the story of Radio's Rugged Ranks. re: Diddler O'Day.

Take a clue from Ralphy and don't shoot your eye out or electrocute anyone.

Here is a free sea story http://www.radiocom.net/vx6/welder.htm and if you work KC4USX with your new imagineered jimmy'ed rig then you will be inducted in to the Killer Dragon's Supreme Lodge. Don't noise it around.

Tinker Dave sed that, aa1a - wd2xsh/17  More fun than a barrel of monkeys.

On 1/28/2018 2:01 PM, 600mrg-request at mailman.qth.net wrote:
> Goody
> K3NG