Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

[M0FMT <m0fmt@yahoo.co.uk>]

Graham

 

Doing your net trawling for you......... :0)

 

http://www.icmfg.com/manufacturers.html

May be a starter for ten? 

 

73 es GL Pete M0FMT IO91UX

From: M0FMT <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Sent: Thursday, 11 April 2013, 10:47
Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

OK Graham

 

Thought it was home brew retro.......... I am in that mode and think everbody else is! What do you do at the moment inject a Sig Genny?

 

Have you checked the net or checked out Vincent - QuartzLab etc?

 

Anyway what's that master osc circuit. I build from old RADCOM (pre 1975 when they published real amateur radio) and PW,QST etal. I use modern xtals with no known issues. Well trying to get third overtone for 10m not to chirp is an issue with me at the moment. 

 

OK yes got a stick on its way didn't want to tear up my existing upconverter design. But not sure there is much wrong with the UC approach it works for me. But want to try the direct approach. Do you get much Cross mod and IM products?

73 es GL Pete M0FMT IO91UX

From: Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org
Sent: Thursday, 11 April 2013, 0:47
Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

Ok Pete

 

Q where to  have  them  made  ?

 

The  set  , Marconi  Ocean span 1950's  valve  tx   needs  the  big  rock's  as the  oscillator  pass's   quite a  lot  of  power  via them ...hc6u  are  no  good  , drive level is very low - the ones fitted  are the wired- gold  flashed  ones  , so  cannot  etch  into the  band ...

 

the  gang  want  to  keep  it  standard

 

73 -G.

 

Ps  waiting  for  qty-3  £6   dongles : )

From: M0FMT

Sent: Wednesday, April 10, 2013 11:43 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

Hi

 

If you want to spend a small fortune get them cut. However build a Mixer VXO from El cheapo standard xtals and or old PMR rocks. Then at your next rally buy a couple of Screw together 10xj or FT243 rocks of any frequency and put the El-cheapo xtals inside. And Hey Presto you have Retro rocks.

I have a small all valve 472 tx that uses 6.00 -6.472=0.472 vxo-able a couple of kc/s 12ax7-6am6-6cl6= 4wattso/p. Local QRP rig.

Hope this helps

 

73 es GL Pete M0FMT IO91UX

From: Graham <g8fzk@g8fzk.fsnet.co.uk>
To: rsgb_lf_group@blacksheep.org
Sent: Wednesday, 10 April 2013, 20:30
Subject: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

Wanted  10XJ  or  FT243  XTALS   Range   236.25    236.75  KHz   

 

Q  Is there  any  manufacture  of   crystals  in this  range  ?

 

Or  Surplus    items   available 

 

QTY 1  or  2  off 

 

TNX- Graham

 

G0NBD