Elecraft

Need SMD capacitor for Moskita kit

Classic

List

Threaded

12 messages Options

Jess Gypin

Need SMD capacitor for Moskita kit

I am working on a Moskita for a challenged ham friend. The 4.7 nF SMD
capacitor is missing from the kit, and quite frankly, I would not mind
having a spare. I am trying to get this done for the ham for Christmas. If
any of you have any advise on where I can find this cap in the next few
days, or if I can complete the kit and leave it off, I would appreciate the
input. I will also call locally tomorrow and see if there is someone that
stocks SMD, but I don't think I will find this at Rat Shack!

Jess AE0CW

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Peter Zenker

AW: Need SMD capacitor for Moskita kit

Jess,

You may use any small 4.7 nF cap instead of the SMD if you solder it with
short legs.

I would send you a 4.7SMD by mail ofcourse, but I am afraid it will not be
at your location in time to finish the project before Xmas

73 de Peter, DL2FI

> -----Ursprüngliche Nachricht-----
> Von: Jess Gypin [mailto:[hidden email]]
> Gesendet: Donnerstag, 16. Dezember 2004 04:08
> An: [hidden email]; [hidden email]
> Cc: [hidden email]
> Betreff: Need SMD capacitor for Moskita kit
>
> I am working on a Moskita for a challenged ham friend. The
> 4.7 nF SMD capacitor is missing from the kit, and quite
> frankly, I would not mind having a spare. I am trying to get
> this done for the ham for Christmas. If any of you have any
> advise on where I can find this cap in the next few days, or
> if I can complete the kit and leave it off, I would
> appreciate the input. I will also call locally tomorrow and
> see if there is someone that stocks SMD, but I don't think I
> will find this at Rat Shack!
>
> Jess AE0CW
>
>
>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

N8LP

Re: AW: Need SMD capacitor for Moskita kit

You could make a temporary gimmick cap by soldering a short length of
small gauge insulated wire to each pad, and then twisting the wires
together a few turns.

Larry N8LP

Peter Zenker wrote:

>Jess,
>
>You may use any small 4.7 nF cap instead of the SMD if you solder it with
>short legs.
>
>I would send you a 4.7SMD by mail ofcourse, but I am afraid it will not be
>at your location in time to finish the project before Xmas
>
>73 de Peter, DL2FI
>
>
>
>
>>-----Ursprüngliche Nachricht-----
>>Von: Jess Gypin [mailto:[hidden email]]
>>Gesendet: Donnerstag, 16. Dezember 2004 04:08
>>An: [hidden email]; [hidden email]
>>Cc: [hidden email]
>>Betreff: Need SMD capacitor for Moskita kit
>>
>>I am working on a Moskita for a challenged ham friend. The
>>4.7 nF SMD capacitor is missing from the kit, and quite
>>frankly, I would not mind having a spare. I am trying to get
>>this done for the ham for Christmas. If any of you have any
>>advise on where I can find this cap in the next few days, or
>>if I can complete the kit and leave it off, I would
>>appreciate the input. I will also call locally tomorrow and
>>see if there is someone that stocks SMD, but I don't think I
>>will find this at Rat Shack!
>>
>>Jess AE0CW
>>
>>
>>
>>
>>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>
>
>
>

N8LP

Re: AW: Need SMD capacitor for Moskita kit

In reply to this post by Peter Zenker

Oops... it was pointed out to me off-list that the required cap is 4.7
"nf"... not the 4.7 "pf" I misread it as. I would expect 4.7 nf more
commonly to be written as .0047 uf, but maybe it's an international thing.

If this is indeed the case, then a gimmick will obviously not work, as
they are only good for very low values of capacitance.

Larry N8LP

Peter Zenker wrote:

Ron D'Eau Claire-2

Puffing to keep up with the Nanofarads...

Larry, N8LP wrote:

Oops... it was pointed out to me off-list that the required cap is 4.7
"nf"... not the 4.7 "pf" I misread it as. I would expect 4.7 nf more
commonly to be written as .0047 uf, but maybe it's an international thing.
------------------------

Your "age" is showing Larry. Even though I do it every day, day in and day
out, nf just isn't intuitive to me. I constantly do a double-take and
mentally shift that decimal point over three spaces.

But we're doomed. The engineering schools today use nf just as often as my
instructors used pf and ufd. My capacitor meter even defaults to the nf
scale!!!

Shoot, I remember when pf was never seen in electronics. Picofarad was
written micro-microfarad or uufd.

Sometimes I feel like I'm "puffing" along to keep up, Hi!

Ron AC7AC

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

N8LP

Re: Puffing to keep up with the Nanofarads...

Guilty on the age charge! I also remember uufd... and what's this
newfangled Hz thing? Hi Hi.

Larry N8LP

Ron D'Eau Claire wrote:

>Larry, N8LP wrote:
>
>Oops... it was pointed out to me off-list that the required cap is 4.7
>"nf"... not the 4.7 "pf" I misread it as. I would expect 4.7 nf more
>commonly to be written as .0047 uf, but maybe it's an international thing.
>------------------------
>
>Your "age" is showing Larry. Even though I do it every day, day in and day
>out, nf just isn't intuitive to me. I constantly do a double-take and
>mentally shift that decimal point over three spaces.
>
>But we're doomed. The engineering schools today use nf just as often as my
>instructors used pf and ufd. My capacitor meter even defaults to the nf
>scale!!!
>
>Shoot, I remember when pf was never seen in electronics. Picofarad was
>written micro-microfarad or uufd.
>
>Sometimes I feel like I'm "puffing" along to keep up, Hi!
>
>Ron AC7AC
>
>
>
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>
>
>
>

Ron D'Eau Claire-2

RE: Puffing to keep up with the Nanofarads...

Larry, N8LP wrote:

Guilty on the age charge! I also remember uufd... and what's this
newfangled Hz thing? Hi Hi.

--------

That hurts too (pun intended).

Ron (often found around 7,035 or 3,545 kc/s) AC7AC

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Paul Saville

Re: Puffing to keep up with the Nanofarads...

In reply to this post by Ron D'Eau Claire-2

My old physics professor made anyone using the term "kilocycles" ride one three times around the campus.

> Mr. Hertz called them cycles !!!

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

k6dgw

Re: Puffing to keep up with the Nanofarads...

In reply to this post by Ron D'Eau Claire-2

Not to rain on anyone's parade, but I think I remember the terms and
abbreviations were:

Microfarads (mf) as in "a 0.1mf wax impregnated paper condenser"

Micromicrofarads (mmf) as in a "3-section 365mmf air variable condenser
for the TRF receiver.

As I recall, it generally was kilocycles (kc or kcs) through ten meters,
and thereafter megacycles (mc or mcs) up to what is now known as 1GHz
(which was called a kilomegacycle [kmcs]). Anything above a few
kilomegacycles hadn't been invented yet.

I have learned to begin with "I think I remember," because often I
really don't remember.

73 and Happy Holidays to all

Fred K6DGW
Auburn CA CM98lw

Ron D'Eau Claire wrote:

>
> Larry, N8LP wrote:
>
> Guilty on the age charge! I also remember uufd... and what's this
> newfangled Hz thing? Hi Hi.
>
> --------
>
> That hurts too (pun intended).
>
> Ron (often found around 7,035 or 3,545 kc/s) AC7AC
>
> _______________________________________________

N8LP

Re: Puffing to keep up with the Nanofarads...

I agree with all that, although I remember referring to GHz as gc (as in
2.1 gee-cee for 2.1 GHz).

My profs only knew Hertz as a radio pioneer... not a term... and my
textbooks as well (still have them).

Larry N8LP

Fred Jensen wrote:

>Not to rain on anyone's parade, but I think I remember the terms and
>abbreviations were:
>
>Microfarads (mf) as in "a 0.1mf wax impregnated paper condenser"
>
>Micromicrofarads (mmf) as in a "3-section 365mmf air variable condenser
>for the TRF receiver.
>
>As I recall, it generally was kilocycles (kc or kcs) through ten meters,
>and thereafter megacycles (mc or mcs) up to what is now known as 1GHz
>(which was called a kilomegacycle [kmcs]). Anything above a few
>kilomegacycles hadn't been invented yet.
>
>I have learned to begin with "I think I remember," because often I
>really don't remember.
>
>73 and Happy Holidays to all
>
>Fred K6DGW
>Auburn CA CM98lw
>
>Ron D'Eau Claire wrote:
>
>
>>Larry, N8LP wrote:
>>
>>Guilty on the age charge! I also remember uufd... and what's this
>>newfangled Hz thing? Hi Hi.
>>
>>--------
>>
>>That hurts too (pun intended).
>>
>>Ron (often found around 7,035 or 3,545 kc/s) AC7AC
>>
>>_______________________________________________
>>
>>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>
>
>
>

Doug Faunt N6TQS +1-510-655-8604

Re: Puffing to keep up with the Nanofarads...

In reply to this post by k6dgw

Date: Thu, 16 Dec 2004 17:40:39 -0800
From: Fred Jensen <[hidden email]>

Not to rain on anyone's parade, but I think I remember the terms and
abbreviations were:

Microfarads (mf) as in "a 0.1mf wax impregnated paper condenser"

Actually, what you're showing as an "m" was a lower-case Greek Mu.
"m" means "milli", an order of magnitude different.

Micromicrofarads (mmf) as in a "3-section 365mmf air variable condenser
for the TRF receiver.

As I recall, it generally was kilocycles (kc or kcs) through ten meters,
and thereafter megacycles (mc or mcs) up to what is now known as 1GHz
(which was called a kilomegacycle [kmcs]). Anything above a few
kilomegacycles hadn't been invented yet.

And "cycles" for frequency, by itself means very little. The proper
term was "cycles per second", which is what "Hertz" replaces, not just
"cycles"

I don't think Mr. Hertz used "cycles" since he was a scientist, and
would think accuracy of expression was important, but he probably used
"cycles per second".

73, doug

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Mike S-8

Re: Puffing to keep up with the Nanofarads...

At 09:06 PM 12/16/2004, Doug Faunt N6TQS +1-510-655-8604 wrote...
>And "cycles" for frequency, by itself means very little. The proper
>term was "cycles per second", which is what "Hertz" replaces, not just
>"cycles"
>
>I don't think Mr. Hertz used "cycles" since he was a scientist, and
>would think accuracy of expression was important, but he probably used
>"cycles per second".

One might presume so, incorrectly. It was common convention to use kilocycles (KC) and megacycles (MC), excluding any reference to "per second."

Here's an ARC-5 transmitter, showing same: http://hug-a-bug.com/arc5b.jpg

This convention also carried over into more formal texts: http://www.nj7p.org/manuals/arc-5/arc-5.html#_Toc460591310

Hertz himself, although occasionally making reference to "times per second", more often used "period of oscillation" and usually used wavelength, which makes sense, since this was much easier to measure at the time. Here's a brief portion of "Electrical Waves": http://historical.library.cornell.edu/gifcache/cdl/cdl334/00134.TIF6.gif

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com