Old quartz crystals
 

Hello.
I want to know the name of the form factor of some old quartz crystals, used
in many receivers as 100KHz marker as well in many transmitters as frequency
generators...
They are similar in all respect to the small plug-in quartz used in
transistor based oscillators, used also these days in the solder-mount
thin-pin version, but are more or less double length, height and width.
The 100KHz version is also again double tall.

I have not one here for giving more precise measures, but I'm sure everyone
understand what I'm writing about... it has to be a standard because I have
a quartz tester with the two sockets: for the big and for the small...

Also, how to name and where to buy the jacks matching a 7-pin miniature tube
socket? It's in use as the accessory port of the FT-220 yaesu.
And how about the 11 pin (not miniature) version, accessory port of the
FT-277?

Thankyou!

Ciao,
AB

.... Andrea Baldoni, 2002: messaggio non protetto da copyright.

Old quartz crystals
 

Andrea Baldoni wrote:
Hello.
I want to know the name of the form factor of some old quartz crystals, used
in many receivers as 100KHz marker as well in many transmitters as frequency
generators...
They are similar in all respect to the small plug-in quartz used in
transistor based oscillators, used also these days in the solder-mount
thin-pin version, but are more or less double length, height and width.
The 100KHz version is also again double tall.

I have not one here for giving more precise measures, but I'm sure everyone
understand what I'm writing about... it has to be a standard because I have
a quartz tester with the two sockets: for the big and for the small...

Also, how to name and where to buy the jacks matching a 7-pin miniature tube
socket? It's in use as the accessory port of the FT-220 yaesu.
And how about the 11 pin (not miniature) version, accessory port of the
FT-277?

Thankyou!

Ciao,
AB

... Andrea Baldoni, 2002: messaggio non protetto da copyright.


Andy writes:

I may be mis-remembering, but the term FT-243 comes to mind....
I believe that is the size that fit in the DX-40 and others......but
I'm trying to remember back 50 years. Good luck,

Andy W4OAH

Old quartz crystals
 

AndyS wrote:

Andrea Baldoni wrote:
Hello.
I want to know the name of the form factor of some old quartz crystals, used
in many receivers as 100KHz marker as well in many transmitters as frequency
generators...
They are similar in all respect to the small plug-in quartz used in
transistor based oscillators, used also these days in the solder-mount
thin-pin version, but are more or less double length, height and width.
The 100KHz version is also again double tall.

I have not one here for giving more precise measures, but I'm sure everyone
understand what I'm writing about... it has to be a standard because I have
a quartz tester with the two sockets: for the big and for the small...

Also, how to name and where to buy the jacks matching a 7-pin miniature tube
socket? It's in use as the accessory port of the FT-220 yaesu.
And how about the 11 pin (not miniature) version, accessory port of the
FT-277?

I may be mis-remembering, but the term FT-243 comes to mind....
I believe that is the size that fit in the DX-40 and others......but

There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

--
Mike Andrews, W5EGO

Tired old sysadmin

Old quartz crystals
 

The 100kc crystals are in tall HC6/U holders. As I recall, it may be an
HC13 holder. Those crystals were used in receivers of the 50's and 60's and
kept right on going into solid state.

73, Colin K7FM

Old quartz crystals
 

There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

International Crystal Manufacturing once sent me a little poster with
drawings of all the different standard crystal sizes including many of
the older ones. They may well have it on their website.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Old quartz crystals
 

"COLIN LAMB" ) writes:
The 100kc crystals are in tall HC6/U holders. As I recall, it may be an
HC13 holder. Those crystals were used in receivers of the 50's and 60's and
kept right on going into solid state.

73, Colin K7FM


Is it still an HC6 holder if it's a longer package? For some reason, I
thought those did receive a different designation.

Michael VE2BVW

Old quartz crystals
 

Mike Andrews wrote:
There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

Andy writes:
I remember taking the FT243 apart and washing the quartz in soap and
water when the activity got low.... Also, rubbing it with pencil
lead in order to change the frequency a little...
...... Ahhhhh........ good times.....

Andy W4OAH

Old quartz crystals
 

In article .com,
AndyS wrote:

Mike Andrews wrote:
There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

I remember taking the FT243 apart and washing the quartz in soap and
water when the activity got low.... Also, rubbing it with pencil
lead in order to change the frequency a little...
..... Ahhhhh........ good times.....

Yes, or shaving it down with Ajax cleanser and toothpaste in order to
change the frequency up a little.

No, wait, that was last night I was doing that....
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Old quartz crystals
 

COLIN LAMB wrote:

: The 100kc crystals are in tall HC6/U holders. As I recall, it may be an
: HC13 holder. Those crystals were used in receivers of the 50's and 60's
: and kept right on going into solid state.

Thankyou very much, it turn out to be HC6/U the big and HC25/U the small.
If it's of someone interest, in

http://www.kenselectronics.com/lists/cbxtal.htm

there are mechanical drawings of the HC6/U, HC25/U and HC18/U holders.

Ciao,
AB

.... Andrea Baldoni, 2002: messaggio non protetto da copyright.

Old quartz crystals
 

On 8/16/06 12:39 PM, in article
, "AndyS"
wrote:


Mike Andrews wrote:
There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

Andy writes:
I remember taking the FT243 apart and washing the quartz in soap and
water when the activity got low.... Also, rubbing it with pencil
lead in order to change the frequency a little...
..... Ahhhhh........ good times.....

Andy W4OAH


I worked in a repair shop in Ketchikan, Ak during my last two years in High
School. We had a large box of crystals in assorted mountings, that were
removed from obsolete fishing boat radios. Most of them were in the 2 to 3
MHz range, so it was easy to grind them up to 75 and 80M.

I agree ......Ahhhhhhh...........good times

Don ex-KL7BCQ. W7SAT, etc