Date   

Re: Pig day

Wendell Morrill
 

Wish that I could hear you in Montana.
N7WM
Wendell

Wow one call right after the other with no CQ's between. Had to take a
coffee break! But now going back for more!! 72 Geo/W2BPI


Pig day

George H. Gates
 

Wow one call right after the other with no CQ's between. Had to take a coffee break! But now going back for more!! 72 Geo/W2BPI


Tonites 40m nets

Wayne Dillon
 

Sorry folks but I eill be unable to perform NC duties toniye, I have to be elswhere.
72/3 de Wayne - KC0PMH
--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-C #11504
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155
SOC #848
30MDG#1176
NEQRP #693
GORC #192


Re: Pig Rig

Hajo Dezelski <dl1sdz@...>
 

Hi,

I was thinking back and forth and could not make up my mind - The reason: I never heard one of you guys over there. Conditions are not so good and my antenna is a NON-Antenna. But when I read, that PigRigs are limited and someone already picked up a PigRig with a number like  #180, I decided that I wanted to have part on the fun.

So: Waiting time is here.

72 de
Hajo (DL1SDZ)

---
... indessen wandelt harmlos droben das Gestirn
... http://hajos-kontrapunkte.blogspot.com/



Re: Tuner

bobby rolph
 

Thanks for all of the great response on my tuner question. This gives me new input to ponder on!
Bobby
kb4qnr

--- In 4sqrp@yahoogroups.com, "bobby" <rolph981@...> wrote:

I was wondering if some of you could comment on what is your favorite tuner for QRP work in the field. I use a MFJ 901B and it works great but it is not really backpack friendly. I just thought that this might make a good topic for discussion.
Tnx
kb4qnr
Bobby


Pig Rig

bobby rolph
 

Mine was number 160 said shipped Saturday but no piggy in the mail today. Did get the the box from Tentec though.
Bobby


Re: PigRigs

WA0ITP
 


Me too, my rig is  #16
 
---------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 

----- Original Message -----
Sent: Wednesday, March 06, 2013 1:38 PM
Subject: Re: [4sqrp] PigRigs

I'm good with that idea!
Tnx Bert !
Johnny AC0BQ

On Wednesday, March 6, 2013, qrpbert wrote:
 


Perhaps we could register the flying pig rigs serial numbers on the groups web page as they come on line ??????

--- In 4sqrp@..., W5COV wrote:
>
> David ,
>
> Mine was ordered just this past Sunday and is S/N 172 .
> It would be interesting to see a list of people that have them or get them and the serial numbers , especially the group members .
>
> Charlie , W5COV
> SKCC #19 and too many others to remember without looking at my list :)
>
> ---- David Martin wrote:
> > Since I received S/N 152, I am now wondering who will receive S/N's 172,
> > 182, etc...
> >
> >
> > On 03/05/2013 07:26 PM, Todd F. Carney / K7TFC wrote:
> > >
> > > Lee,
> > >
> > >
> > > Mine has shipped as #169. I'm actually hoping it's in my mailbox when
> > > I get home!!! Time to heat up the soldering iron.
> > >
> > > 73,
> > >
> > > Todd
> > > ----------------------------------------------------------
> > > K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
> > > ----------------------------------------------------------
> > > QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design
> > >
> > >
> > > On Tue, Mar 5, 2013 at 1:34 PM, Lee Mairs (SAG)
> > > wrote:
> > >
> > > I bought mine (#157) on March 1. Got an acknowledgement that said
> > > it had been shipped first class, but no tracking info. Has anybody
> > > bought a higher serial number and already has the kit in hand?
> > > 73 de Lee
> > > KM4YY
> > >
> > > On 3/5/2013 2:09 PM, bobstep wrote:
> > >>
> > >> Please add me to the list. I have my Pig Rig but have not started
> > >> construction yet.
> > >>
> > >> Bob Stephens
> > >> AF9W
> > >>
> > >> --- In 4sqrp@... ,
> > >> "WA0ITP" wrote:
> > >> >
> > >> > Right on Jerry.
> > >> >
> > >> > If the Group is interested, I'll organize a group purchase of
> > >> 7122 crystals. They will probably cost between $1 and $2 each.
> > >> I'll take the bulk delivery and mail your 4 xtals to you. The
> > >> postage will be on my nickel.
> > >> >
> > >> > If at least 10 members sign up, I'll go ahead and place the
> > >> order. Wanna do it?
> > >> >
> > >> > FYI Diz only has 60 PigRigs left.
> > >> >
> > >> > btw usual disclaimers apply both on the crystals and the rigs.
> > >> >
> > >> > ----------------------------------
> > >> > I love this radio stuff !
> > >> > 72 WAØITP
> > >> > www.wa0itp.com http://www.wa0itp.com>
> > >> > www.4sqrp.com http://www.4sqrp.com>
> > >> > www.qrpspots.com http://www.qrpspots.com>
> > >> >
> > >> >
> > >> >
> > >> > ----- Original Message -----
> > >> > From: Jerry Haigwood
> > >> > To: 4sqrp@...
> > >> > Sent: Sunday, March 03, 2013 1:11 PM
> > >> > Subject: RE: [4sqrp] 4S QRP Watering Holes!
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > Hi All,
> > >> >
> > >> > I believe it was Diz’s intent to use the Pig Rig for clubs,
> > >> nets, etc. Each club (such as 4sqrp) could have their very own
> > >> frequency setup. That way, the club members could stay in contact
> > >> with one another. It is not necessary to stick with 7030.7KHz but
> > >> rather the club could pick a different frequency. Once the club
> > >> had picked a frequency then the club would buy the required
> > >> crystals from whomever they like to put their pig rigs on that
> > >> frequency. The radio was never intended to be a general purpose
> > >> 40 meter radio but was intended for single frequency use by clubs
> > >> or nets. I remember when I was about 16 years old, the one of the
> > >> local AM radio stations was giving away am radios as a promotion.
> > >> Of course, the radios only received the single am station that
> > >> was giving them away! They had a single knob â€" on/off and volume.
> > >> >
> > >> > Jerry W5JH
> > >> >
> > >> > "building something without experimenting is just solder practice"
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > From: 4sqrp@...
> > >> [mailto:4sqrp@... ]
> > >> On Behalf Of Bill Cromwell
> > >> > Sent: Sunday, March 03, 2013 9:16 AM
> > >> > To: 4sqrp@... ;
> > >> John R. Lonigro
> > >> > Cc: Charles Moizeau
> > >> > Subject: Re: [4sqrp] 4S QRP Watering Holes!
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > On Sun, 2013-03-03 at 05:50 -0600, John R. Lonigro wrote:
> > >> > >
> > >> > > Charles:
> > >> > >
> > >> > > The unique feature of the Pigrig is the narrow crystal filter
> > >> is also
> > >> > > tuned to 7.031 MHz. The entire rig is designed around that
> > >> frequency.
> > >> > > Diz was able to do that because it is a single frequency rig.
> > >> That's
> > >> > > why, for example, you can't easily modify it to use the SAVXO.
> > >> > >
> > >> > > 72,
> > >> > > John AA0VE
> > >> >
> > >> > Hi,
> > >> >
> > >> > To be crystal clear (pun intended) the crystal filter is in the
> > >> front
> > >> > end of the receiver and NOT at some IF or "shifted frequency".
> > >> A VXO
> > >> > won't help much. It sounds like a lot of fun. But it's not my
> > >> cup of tea
> > >> > being so restricted, either. Unless..I have some *other* radios
> > >> I can
> > >> > use when the Pig Rig frequency is in use. Like the radios that
> > >> surround
> > >> > me when I'm typing emails (evil grin).
> > >> >
> > >> > 73,
> > >> >
> > >> > Bill KU8H
> > >> >
> > >>
> > >
> > >
> > >
> >
> >
> > --
> > *David Martin - K5DCM ---o0o---
> > Mountain Home, Arkansas*
> > Guns don't kill people, any more than spoons & forks cause obesity.
> >
>


Re: Fixing a broken toroid

Todd K7TFC
 

I, too, have heard of the changes (AsubL?) introduced by gaps in toroids. Instead of glue, I think I might be inclined to use either tape or a zip tie around the circumference of the toroid to hold it back together. I think the right-sized zip tie would be easier because it would allow for more-careful adjustment of the two halves (by cinching the tie to the point of snuggness) before cinching it up tight.  

Now I'm sure there would be changes in the number of windings required since the wire would also be wound over the zip tie. It might be, though, that the way to do that would be to use tape to hold the two halves together while winding the toroid, but then to cinch it up tight afterwards with a tie.

73,

Todd
------------------------------------------------------------------------------------
K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
------------------------------------------------------------------------------------
QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design


On Wed, Mar 6, 2013 at 7:56 AM, nm0s_qrp <ai9e_qrp@...> wrote:
 

In my experience, if it is an iron powder toroid, the effect of gluing a broken part will be minimal. There will be some minor drift of its value over time as oxygen and humidity enter at the break, but if the toroid is part of an output filter network, it is not a major problem. If it is part of a VFO, you might want to consider replacing it.

If the part is a ferrite, there will be a more significant change in its inductance from the small gap that is introduced in the magnetic circuit, especially if the part is a high permeability material like 72 or 77. For an RF transformer, where the open circuit inductance is not critical, you are probably OK. If it is part of a tuned circuit (where ferrites are seldom used), check the circuit to see how a change of inductance will affect it.

73 NM0S



--- In 4sqrp@..., CStratton wrote:
>
> I dropped a toroid I was going to use for an antenna matchbox transformer,
> and it broke in two. I've super-glued it back together, and can only see
> the faintest hairline crack with a magnifier. My guess is that since we are
> dealing with fields and not electron flow within the toroid that it will
> still perform as well as it would have before the accident.
>
> What say an expert?
>
> Thanks,
> Chip
> AE5KA
>



Re: PigRigs

Mike-WE0H
 

Do it :)
Mike-WE0H



qrpbert wrote:

 


Perhaps we could register the flying pig rigs serial numbers on the groups web page as they come on line ??????



Re: PigRigs

davemrtn
 


Re: PigRigs

Johnny AC0BQ
 

I'm good with that idea!
Tnx Bert !
Johnny AC0BQ


On Wednesday, March 6, 2013, qrpbert wrote:
 


Perhaps we could register the flying pig rigs serial numbers on the groups web page as they come on line ??????

--- In 4sqrp@..., W5COV wrote:
>
> David ,
>
> Mine was ordered just this past Sunday and is S/N 172 .
> It would be interesting to see a list of people that have them or get them and the serial numbers , especially the group members .
>
> Charlie , W5COV
> SKCC #19 and too many others to remember without looking at my list :)
>
> ---- David Martin wrote:
> > Since I received S/N 152, I am now wondering who will receive S/N's 172,
> > 182, etc...
> >
> >
> > On 03/05/2013 07:26 PM, Todd F. Carney / K7TFC wrote:
> > >
> > > Lee,
> > >
> > >
> > > Mine has shipped as #169. I'm actually hoping it's in my mailbox when
> > > I get home!!! Time to heat up the soldering iron.
> > >
> > > 73,
> > >
> > > Todd
> > > ----------------------------------------------------------
> > > K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
> > > ----------------------------------------------------------
> > > QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design
> > >
> > >
> > > On Tue, Mar 5, 2013 at 1:34 PM, Lee Mairs (SAG)
> > > wrote:
> > >
> > > I bought mine (#157) on March 1. Got an acknowledgement that said
> > > it had been shipped first class, but no tracking info. Has anybody
> > > bought a higher serial number and already has the kit in hand?
> > > 73 de Lee
> > > KM4YY
> > >
> > > On 3/5/2013 2:09 PM, bobstep wrote:
> > >>
> > >> Please add me to the list. I have my Pig Rig but have not started
> > >> construction yet.
> > >>
> > >> Bob Stephens
> > >> AF9W
> > >>
> > >> --- In 4sqrp@... ,
> > >> "WA0ITP" wrote:
> > >> >
> > >> > Right on Jerry.
> > >> >
> > >> > If the Group is interested, I'll organize a group purchase of
> > >> 7122 crystals. They will probably cost between $1 and $2 each.
> > >> I'll take the bulk delivery and mail your 4 xtals to you. The
> > >> postage will be on my nickel.
> > >> >
> > >> > If at least 10 members sign up, I'll go ahead and place the
> > >> order. Wanna do it?
> > >> >
> > >> > FYI Diz only has 60 PigRigs left.
> > >> >
> > >> > btw usual disclaimers apply both on the crystals and the rigs.
> > >> >
> > >> > ----------------------------------
> > >> > I love this radio stuff !
> > >> > 72 WAØITP
> > >> > www.wa0itp.com http://www.wa0itp.com>
> > >> > www.4sqrp.com http://www.4sqrp.com>
> > >> > www.qrpspots.com http://www.qrpspots.com>
> > >> >
> > >> >
> > >> >
> > >> > ----- Original Message -----
> > >> > From: Jerry Haigwood
> > >> > To: 4sqrp@...
> > >> > Sent: Sunday, March 03, 2013 1:11 PM
> > >> > Subject: RE: [4sqrp] 4S QRP Watering Holes!
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > Hi All,
> > >> >
> > >> > I believe it was Diz’s intent to use the Pig Rig for clubs,
> > >> nets, etc. Each club (such as 4sqrp) could have their very own
> > >> frequency setup. That way, the club members could stay in contact
> > >> with one another. It is not necessary to stick with 7030.7KHz but
> > >> rather the club could pick a different frequency. Once the club
> > >> had picked a frequency then the club would buy the required
> > >> crystals from whomever they like to put their pig rigs on that
> > >> frequency. The radio was never intended to be a general purpose
> > >> 40 meter radio but was intended for single frequency use by clubs
> > >> or nets. I remember when I was about 16 years old, the one of the
> > >> local AM radio stations was giving away am radios as a promotion.
> > >> Of course, the radios only received the single am station that
> > >> was giving them away! They had a single knob â€" on/off and volume.
> > >> >
> > >> > Jerry W5JH
> > >> >
> > >> > "building something without experimenting is just solder practice"
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > From: 4sqrp@...
> > >> [mailto:4sqrp@... ]
> > >> On Behalf Of Bill Cromwell
> > >> > Sent: Sunday, March 03, 2013 9:16 AM
> > >> > To: 4sqrp@... ;
> > >> John R. Lonigro
> > >> > Cc: Charles Moizeau
> > >> > Subject: Re: [4sqrp] 4S QRP Watering Holes!
> > >> >
> > >> >
> > >> >
> > >> >
> > >> >
> > >> > On Sun, 2013-03-03 at 05:50 -0600, John R. Lonigro wrote:
> > >> > >
> > >> > > Charles:
> > >> > >
> > >> > > The unique feature of the Pigrig is the narrow crystal filter
> > >> is also
> > >> > > tuned to 7.031 MHz. The entire rig is designed around that
> > >> frequency.
> > >> > > Diz was able to do that because it is a single frequency rig.
> > >> That's
> > >> > > why, for example, you can't easily modify it to use the SAVXO.
> > >> > >
> > >> > > 72,
> > >> > > John AA0VE
> > >> >
> > >> > Hi,
> > >> >
> > >> > To be crystal clear (pun intended) the crystal filter is in the
> > >> front
> > >> > end of the receiver and NOT at some IF or "shifted frequency".
> > >> A VXO
> > >> > won't help much. It sounds like a lot of fun. But it's not my
> > >> cup of tea
> > >> > being so restricted, either. Unless..I have some *other* radios
> > >> I can
> > >> > use when the Pig Rig frequency is in use. Like the radios that
> > >> surround
> > >> > me when I'm typing emails (evil grin).
> > >> >
> > >> > 73,
> > >> >
> > >> > Bill KU8H
> > >> >
> > >>
> > >
> > >
> > >
> >
> >
> > --
> > *David Martin - K5DCM ---o0o---
> > Mountain Home, Arkansas*
> > Guns don't kill people, any more than spoons & forks cause obesity.
> >
>


Re: PigRigs

Robert
 

Perhaps we could register the flying pig rigs serial numbers on the groups web page as they come on line ??????

--- In 4sqrp@yahoogroups.com, W5COV <cvest@...> wrote:

David ,

Mine was ordered just this past Sunday and is S/N 172 .
It would be interesting to see a list of people that have them or get them and the serial numbers , especially the group members .

Charlie , W5COV
SKCC #19 and too many others to remember without looking at my list :)

---- David Martin <davemrtn@...> wrote:
Since I received S/N 152, I am now wondering who will receive S/N's 172,
182, etc...


On 03/05/2013 07:26 PM, Todd F. Carney / K7TFC wrote:

Lee,


Mine has shipped as #169. I'm actually hoping it's in my mailbox when
I get home!!! Time to heat up the soldering iron.

73,

Todd
------------------------------------------------------------------------------------
K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
------------------------------------------------------------------------------------
QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design


On Tue, Mar 5, 2013 at 1:34 PM, Lee Mairs (SAG) <lmairs@...
<mailto:lmairs@...>> wrote:

I bought mine (#157) on March 1. Got an acknowledgement that said
it had been shipped first class, but no tracking info. Has anybody
bought a higher serial number and already has the kit in hand?
73 de Lee
KM4YY

On 3/5/2013 2:09 PM, bobstep wrote:

Please add me to the list. I have my Pig Rig but have not started
construction yet.

Bob Stephens
AF9W

--- In 4sqrp@yahoogroups.com <mailto:4sqrp%40yahoogroups.com>,
"WA0ITP" wrote:
>
> Right on Jerry.
>
> If the Group is interested, I'll organize a group purchase of
7122 crystals. They will probably cost between $1 and $2 each.
I'll take the bulk delivery and mail your 4 xtals to you. The
postage will be on my nickel.
>
> If at least 10 members sign up, I'll go ahead and place the
order. Wanna do it?
>
> FYI Diz only has 60 PigRigs left.
>
> btw usual disclaimers apply both on the crystals and the rigs.
>
> ----------------------------------
> I love this radio stuff !
> 72 WAØITP
> www.wa0itp.com <http://www.wa0itp.com>
> www.4sqrp.com <http://www.4sqrp.com>
> www.qrpspots.com <http://www.qrpspots.com>
>
>
>
> ----- Original Message -----
> From: Jerry Haigwood
> To: 4sqrp@yahoogroups.com <mailto:4sqrp%40yahoogroups.com>
> Sent: Sunday, March 03, 2013 1:11 PM
> Subject: RE: [4sqrp] 4S QRP Watering Holes!
>
>
>
>
>
> Hi All,
>
> I believe it was Diz’s intent to use the Pig Rig for clubs,
nets, etc. Each club (such as 4sqrp) could have their very own
frequency setup. That way, the club members could stay in contact
with one another. It is not necessary to stick with 7030.7KHz but
rather the club could pick a different frequency. Once the club
had picked a frequency then the club would buy the required
crystals from whomever they like to put their pig rigs on that
frequency. The radio was never intended to be a general purpose
40 meter radio but was intended for single frequency use by clubs
or nets. I remember when I was about 16 years old, the one of the
local AM radio stations was giving away am radios as a promotion.
Of course, the radios only received the single am station that
was giving them away! They had a single knob â€" on/off and volume.
>
> Jerry W5JH
>
> "building something without experimenting is just solder practice"
>
>
>
>
>
>
>
> From: 4sqrp@yahoogroups.com <mailto:4sqrp%40yahoogroups.com>
[mailto:4sqrp@yahoogroups.com <mailto:4sqrp%40yahoogroups.com>]
On Behalf Of Bill Cromwell
> Sent: Sunday, March 03, 2013 9:16 AM
> To: 4sqrp@yahoogroups.com <mailto:4sqrp%40yahoogroups.com>;
John R. Lonigro
> Cc: Charles Moizeau
> Subject: Re: [4sqrp] 4S QRP Watering Holes!
>
>
>
>
>
> On Sun, 2013-03-03 at 05:50 -0600, John R. Lonigro wrote:
> >
> > Charles:
> >
> > The unique feature of the Pigrig is the narrow crystal filter
is also
> > tuned to 7.031 MHz. The entire rig is designed around that
frequency.
> > Diz was able to do that because it is a single frequency rig.
That's
> > why, for example, you can't easily modify it to use the SAVXO.
> >
> > 72,
> > John AA0VE
>
> Hi,
>
> To be crystal clear (pun intended) the crystal filter is in the
front
> end of the receiver and NOT at some IF or "shifted frequency".
A VXO
> won't help much. It sounds like a lot of fun. But it's not my
cup of tea
> being so restricted, either. Unless..I have some *other* radios
I can
> use when the Pig Rig frequency is in use. Like the radios that
surround
> me when I'm typing emails (evil grin).
>
> 73,
>
> Bill KU8H
>


--
*David Martin - K5DCM ---o0o---
Mountain Home, Arkansas*
Guns don't kill people, any more than spoons & forks cause obesity.


Re: Diode sub

John DeJournett
 

First, if you really want an authoratative answer, best to ask Diz.  As he designed the kit, he could advise you about being able to substitute the part.
 
My own view is that most of the 1n5711's in the pig rig are used as clamping diodes.  As such, their forward voltage is a critical parameter.  The spec sheets show the 1n5711 to have a considerably lower Vf than the MBR1100.  This being the case, I would be cautious where I swapped.  It looks like D8 might be ok to substitute, but it may also limit the AGC performance. 
 
Just my uneducated opinion, and worth everything you paid for it.
 
John, KD0JXN


On Wed, Mar 6, 2013 at 10:05 AM, Johnny Matlock <jomatlock@...> wrote:
 

Gm group

Is a mbr1100 a good sub for a 1n5711?
I was short one in my pig rig!
They look good to me?
Thanks 
Johnny AC0BQ



Diode sub

Johnny AC0BQ
 

Gm group
Is a mbr1100 a good sub for a 1n5711?
I was short one in my pig rig!
They look good to me?
Thanks 
Johnny AC0BQ


Re: Tuner

Mike-WE0H
 

I use my LDG auto tuner with a 44' doublet fed with twinlead and a balun with a 10' length of RG-58 to the tuner. Perfect for 40m thru 6m.
Mike-WE0H


Re: Tuner

davemrtn
 


Re: Fixing a broken toroid

nm0s_qrp <ai9e_qrp@...>
 

In my experience, if it is an iron powder toroid, the effect of gluing a broken part will be minimal. There will be some minor drift of its value over time as oxygen and humidity enter at the break, but if the toroid is part of an output filter network, it is not a major problem. If it is part of a VFO, you might want to consider replacing it.

If the part is a ferrite, there will be a more significant change in its inductance from the small gap that is introduced in the magnetic circuit, especially if the part is a high permeability material like 72 or 77. For an RF transformer, where the open circuit inductance is not critical, you are probably OK. If it is part of a tuned circuit (where ferrites are seldom used), check the circuit to see how a change of inductance will affect it.

73 NM0S

--- In 4sqrp@yahoogroups.com, CStratton <groups@...> wrote:

I dropped a toroid I was going to use for an antenna matchbox transformer,
and it broke in two. I've super-glued it back together, and can only see
the faintest hairline crack with a magnifier. My guess is that since we are
dealing with fields and not electron flow within the toroid that it will
still perform as well as it would have before the accident.

What say an expert?

Thanks,
Chip
AE5KA


Re: Fixing a broken toroid

John DeJournett
 

I was once told that in Ham Radio and antennas in particular, anything works, but some work better than others.  I would say try it.  For an experiment you are out nothing but your time.  If the performance isn't up to expectations though, you will want to replace the core.


On Wed, Mar 6, 2013 at 9:35 AM, CStratton <groups@...> wrote:
 

I dropped a toroid I was going to use for an antenna matchbox transformer, and it broke in two. I've super-glued it back together, and can only see the faintest hairline crack with a magnifier. My guess is that since we are dealing with fields and not electron flow within the toroid that it will still perform as well as it would have before the accident.

What say an expert?

Thanks,
Chip
AE5KA



Fixing a broken toroid

random.path
 

I dropped a toroid I was going to use for an antenna matchbox transformer, and it broke in two. I've super-glued it back together, and can only see the faintest hairline crack with a magnifier. My guess is that since we are dealing with fields and not electron flow within the toroid that it will still perform as well as it would have before the accident.

What say an expert?

Thanks,
Chip
AE5KA


Re: Tuner

David Bixler <qrp@...>
 

Hi Bobby and the gang:

If your transceiver does not have an internal tuner (like the Elecraft K1 transceiver) I'd suggest that the Emtech ZM-2 would be my choice. It's a Z-match tuner and works well on 80 to 15 meters which is the range you will be most likely be using in the field.

http://emtech.steadynet.com/zm2.shtml

If you are concentrating on one or two bands and want to use a half-wave wire, a homebrew EFHW tuner is very compact. Here's my version for 40 and 20 meters:

http://w0ch.com/field_antenna/field_antenna.htm

Good topic!

73, Dave W0CH

**


I was wondering if some of you could comment on what is your favorite
tuner for QRP work in the field. I use a MFJ 901B and it works great but it
is not really backpack friendly. I just thought that this might make a good
topic for discussion.
Tnx
kb4qnr
Bobby