Re: binocular cores - to twist or not to twist!
Good Afternoon Everyone,
Has anybody tried phone cable, stripping off the white outer and then using
2 or 3 of the coloured inner wires, twisted of course, for winding the
toroids?
Dave M1DGS
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Re: binocular cores - to twist or not to twist!
Jim
Is the ribbon cable that stranded wire or solid??? And if stranded, does it make a difference in toroid s??? I've never used stranded in making them and have never heard if it makes a difference.... Seems like ribbon cable might be easier to wind...
73
Ron K9RWU
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--- In BITX20@..., "Leonard" <dredger@...> wrote:
I found a picture while I was looking for something else. This stuff works great and sure is easy to use.
Leonard
--- In BITX20@..., "Leonard" <dredger@> wrote:
I have a few rolls of what looks like 30ga ribbon cable. It was used in hard drives. I've posted pictures of it in the past but can't find them. It's my wire of choice for torroids. It was expensive though on the retail market.
Leonard
--- In BITX20@..., Jim <n6otq@> wrote:
Add to all this -- twist your windings and it makes it a lot easier to wind.
73
Jim N6OTQ?
________________________________
From: Raj <vu2zap@>
To: BITX20@...
Sent: Saturday, June 29, 2013 7:42 AM
Subject: RE: [BITX20] binocular cores - to twist or not to twist!
Ahem! elaborating for Sandeep..
Twisted pairs have lesser capacitance with the next turn or layer than untwisted pairs of wires AFAIK!
Twisted pairs in balanced configuration also reduces the stray signal pickup from nearby circuits/radiators.
73
--
Raj, vu2zap
[Non-text portions of this message have been removed]
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Hi Arnab Congrats once again...!! Come near 14.200 now...lets do some qso.... 73s, Sourav VU3CGB ________________________________ Sent from Samsung Galaxy Note On 1 Jul 2013 20:13, "arnab bhaumik" <arnab_bhaumik2000@...> wrote: **
hi farhan,
i just completed building another bitx20. and this time its
working perfectly. yesterday (sunday) afternoon i had a qso with vu3cgb
with my bitx20. and at the evening had received meny dx stations. i have a
inverted-v around 5year old. planning to erect it higher and make it a
dipole.
with 12volt battery and a t-match antenna tuner it is giving
around 4watt of rf output. with dummy load it increased the drain voltage
of irf510 around 45volt. --it seems stable.
thanks for the nice design.
________________________________
From: Ashhar Farhan <farhanbox@...>
To: BITX20@...
Sent: Monday, 1 July 2013 8:38 AM
Subject: Re: [BITX20] can any one provide me the inductance value of the
coils used in bitx20 v3
The wire gauge for the broadband transformers is not very specific. If
you can get those many turns through the toroid/binocular former, you
are ok. As they are broadband in nature, they will also be broadly
tolerant of wire size etc. As long as it is not so thin that the
current passing through will melt it!
The value of rf band pass and power amp's low pass filters is given in
the original circuit.
- farhan
On 6/30/13, {vu3sxn} - shubham tiwari <vu3sxn@...> wrote:
BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper
wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun
core..
thanks
shubham tiwari
vu3sxn
[Non-text portions of this message have been removed]
--
Sent from my mobile device
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
|
Re: can any one provide me the inductance value of the coils used in bitx20 v3
I have been able to find insulated copper wire at stores that sell fly fishing gear. And at craft stores that sell the things to make beaded jewelry. Don't know how good it is but they have it in all the colors of the rainbow.
________________________________
From: {vu3sxn} - shubham tiwari <vu3sxn@...>
To: bitx <BITX20@...>
Sent: Saturday, June 29, 2013 6:06 PM
Subject: [BITX20] can any one provide me the inductance value of the coils used in bitx20 v3
?
BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun core..
thanks
shubham tiwari
vu3sxn
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
|
hi farhan, ??????? i just completed building another bitx20. and this time its working perfectly. yesterday (sunday)? afternoon i had a qso with vu3cgb with my bitx20. and at the evening had received meny dx stations. i have a inverted-v around 5year old. planning to erect it higher and make it a dipole. ?????? with? 12volt battery? and a t-match antenna tuner it is giving around 4watt of rf output. with dummy load it increased the drain voltage of irf510 around 45volt. --it seems stable. thanks for the nice design. ________________________________ From: Ashhar Farhan <farhanbox@...> To: BITX20@... Sent: Monday, 1 July 2013 8:38 AM Subject: Re: [BITX20] can any one provide me the inductance value of the coils used in bitx20 v3 ? The wire gauge for the broadband transformers is not very specific. If you can get those many turns through the toroid/binocular former, you are ok. As they are broadband in nature, they will also be broadly tolerant of wire size etc. As long as it is not so thin that the current passing through will melt it! The value of rf band pass and power amp's low pass filters is given in the original circuit. - farhan On 6/30/13, {vu3sxn} - shubham tiwari <vu3sxn@...> wrote: BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper
wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun
core..
thanks
shubham tiwari
vu3sxn
[Non-text portions of this message have been removed]
-- Sent from my mobile device [Non-text portions of this message have been removed]
|
Re: can any one provide me the inductance value of the coils used in bitx20 v3
The wire gauge for the broadband transformers is not very specific. If
you can get those many turns through the toroid/binocular former, you
are ok. As they are broadband in nature, they will also be broadly
tolerant of wire size etc. As long as it is not so thin that the
current passing through will melt it!
The value of rf band pass and power amp's low pass filters is given in
the original circuit.
- farhan
toggle quoted message
Show quoted text
On 6/30/13, {vu3sxn} - shubham tiwari <vu3sxn@...> wrote: BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper
wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun
core..
thanks
shubham tiwari
vu3sxn
--
Sent from my mobile device
|
Re: Alternative To BB204 Varicap In IK3OIL FLL?
The 30volt device may also be found in the old cable boxes, most of those I tore up were 30 volt tuning. Also most were positive ground power supplies. Quoting arv : Rob The BB204 dual varicap is a 30 volt device. Capacitance is 14 pf with a 2.6 voltage to capacitance ratio. < > The BB204B has slightly higher capacitance, 47 pf versus 39 pf, than the BB204G. These devices were designed for electronic tuning of FM radio receivers. That may give you some idea where to look for surplus and salvage units. Arv - K7HKL _._ On 06/30/2013 06:19 PM, iam74@... wrote:
--- In BITX20@... , > "rob_kay14758" wrote: > > > > Just
building the IK3OIL frequency counter/vfo fll, struggling in > the
u.k. to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks > > Rob > > > > Dan's Small Parts has BB104 on sale
at 20/$US8.00. > > Alas, it is only for U.S. customers. > > The
BB104, if you can find it, is a good substitute. It is what I used >
in my IK3OIL fll controller. Also two of the MV1xx varicaps >
back-to-back will work, as suggested elsewhere. > > john > AD5YE > >
[Non-text portions of this message have been removed] Paul Daulton K5WMS beacon WMS
185.302 khz qrss30/slow 24/7 Jacksonville,Ar 72076 em34wu
[Non-text portions of this message have been removed]
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Re: Alternative To BB204 Varicap In IK3OIL FLL?
Rob
The BB204 dual varicap is a 30 volt device. Capacitance is 14 pf with a
2.6 voltage to capacitance ratio.
<
>
The BB204B has slightly higher capacitance, 47 pf versus 39 pf, than the
BB204G.
These devices were designed for electronic tuning of FM radio
receivers. That may
give you some idea where to look for surplus and salvage units.
Arv - K7HKL
_._
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Show quoted text
On 06/30/2013 06:19 PM, iam74@... wrote:
--- In BITX20@... <mailto:BITX20%40yahoogroups.com>,
"rob_kay14758" <rob_kay14758@...> wrote:
Just building the IK3OIL frequency counter/vfo fll, struggling in
the u.k. to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks
Rob
Dan's Small Parts has BB104 on sale at 20/$US8.00.
Alas, it is only for U.S. customers.
The BB104, if you can find it, is a good substitute. It is what I used
in my IK3OIL fll controller. Also two of the MV1xx varicaps
back-to-back will work, as suggested elsewhere.
john
AD5YE
|
Re: Alternative To BB204 Varicap In IK3OIL FLL?
--- In BITX20@..., "rob_kay14758" <rob_kay14758@...> wrote:
Just building the IK3OIL frequency counter/vfo fll, struggling in the u.k. to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks
Rob
Dan's Small Parts has BB104 on sale at 20/$US8.00. Alas, it is only for U.S. customers. The BB104, if you can find it, is a good substitute. It is what I used in my IK3OIL fll controller. Also two of the MV1xx varicaps back-to-back will work, as suggested elsewhere. john AD5YE
|
Re: binocular cores - to twist or not to twist!
--- In BITX20@..., "Leonard" <dredger@...> wrote:
I found a picture while I was looking for something else. This stuff works great and sure is easy to use.
Leonard
This was (is) originally flat "rainbow" IDE cable. It is now called "Dupont" cable on e-bay. I saw one offer of 1m. of 40-conductor cable for $US3.50. It is probably 28 gauge. Any of the original IDE-33, IDE-66, or floppy drive cables can be salvaged for use, though most of them are a drab grey. The ATA-66 cables are a little different in that they have a parallel ground wire for each signal wire, and so are quite a bit finer gauge. There is also some earlier flat cable that had periodic crossed wires in them that were used to interface early (1960's) computers with industrial processing machines. The crossed wires are to cancel some interference. You might come across that now and then. If you do, get it. It is a very rugged and well-defined cable. john AD5YE
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Re: binocular cores - to twist or not to twist!
I highly reccomend it! I have several hundred feet of both in storage or I could give the original stock number. The rolls I have came surplus from the local hard drive people.
Leonard
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Show quoted text
--- In BITX20@..., Edwin Carter <carteredwin@...> wrote:
Kangaus has it for 50 cents per foot for the tri and 35 cents for the bi
wire. However I don't know how long he is going to be closed since he
had a stroke. It is great to work with.
WA4YHL
On 6/30/2013 3:11 PM, Leonard wrote:
I found a picture while I was looking for something else. This stuff
works great and sure is easy to use.
Leonard
--- In BITX20@... <mailto:BITX20%40yahoogroups.com>,
"Leonard" <dredger@> wrote:
I have a few rolls of what looks like 30ga ribbon cable. It was used
in hard drives. I've posted pictures of it in the past but can't find
them. It's my wire of choice for torroids. It was expensive though on
the retail market.
Leonard
--- In BITX20@... <mailto:BITX20%40yahoogroups.com>, Jim <n6otq@> wrote:
Add to all this -- twist your windings and it makes it a lot
easier to wind.
73
Jim N6OTQ
________________________________
From: Raj <vu2zap@>
To: BITX20@... <mailto:BITX20%40yahoogroups.com>
Sent: Saturday, June 29, 2013 7:42 AM
Subject: RE: [BITX20] binocular cores - to twist or not to twist!
Ahem! elaborating for Sandeep..
Twisted pairs have lesser capacitance with the next turn or layer
than untwisted pairs of wires AFAIK!
Twisted pairs in balanced configuration also reduces the stray
signal pickup from nearby circuits/radiators.
73
--
Raj, vu2zap
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
|
Re: Alternative To BB204 Varicap In IK3OIL FLL?
On Sun, Jun 30, 2013 at 10:55 AM, rob_kay14758 <rob_kay14758@...> wrote: **
Just building the IK3OIL frequency counter/vfo fll, struggling in the
u.k. to find BB204 double varicap, can anyone suggest an alternative?Rob,
There are several listed on eBay for worldwide delivery. Here's one: Here's another source that offers worldwide shipping. Also, here's the datasheet for the BB204 series. It will show key characteristics you can compare with other devices. Key characteristics include the voltage ratio and the voltage-to-capacitance curve. You know, now that I think of it, two single varactors (closely matched with the right characteristics) ought to work cathode to cathode. There's no doubt lots of other sources can be found a'Googlin'. These are just a few. 73, Todd ------------------------------------------------------------------------------------ K7TFC / Medford, Oregon, USA / CN82ni / UTC-8 ------------------------------------------------------------------------------------ QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design
|
Re: binocular cores - to twist or not to twist!
Kangaus has it for 50 cents per foot for the tri and 35 cents for the bi
wire. However I don't know how long he is going to be closed since he
had a stroke. It is great to work with.
WA4YHL
toggle quoted message
Show quoted text
On 6/30/2013 3:11 PM, Leonard wrote:
I found a picture while I was looking for something else. This stuff
works great and sure is easy to use.
Leonard
--- In BITX20@... <mailto:BITX20%40yahoogroups.com>,
"Leonard" <dredger@...> wrote:
I have a few rolls of what looks like 30ga ribbon cable. It was used
in hard drives. I've posted pictures of it in the past but can't find
them. It's my wire of choice for torroids. It was expensive though on
the retail market.
Leonard
--- In BITX20@... <mailto:BITX20%40yahoogroups.com>, Jim <n6otq@> wrote:
Add to all this -- twist your windings and it makes it a lot
easier to wind.
73
Jim N6OTQ
________________________________
From: Raj <vu2zap@>
To: BITX20@... <mailto:BITX20%40yahoogroups.com>
Sent: Saturday, June 29, 2013 7:42 AM
Subject: RE: [BITX20] binocular cores - to twist or not to twist!
Ahem! elaborating for Sandeep..
Twisted pairs have lesser capacitance with the next turn or layer
than untwisted pairs of wires AFAIK!
Twisted pairs in balanced configuration also reduces the stray
signal pickup from nearby circuits/radiators.
73
--
Raj, vu2zap
|
Re: Alternative To BB204 Varicap In IK3OIL FLL?
Replacement is the MV104 easy to find.cap 2-37pf volt 1-32v case t-92 Good luck Ron
toggle quoted message
Show quoted text
--- In BITX20@..., "rob_kay14758" <rob_kay14758@...> wrote:
Just building the IK3OIL frequency counter/vfo fll, struggling in the u.k. to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks
Rob
|
Re: Alternative To BB204 Varicap In IK3OIL FLL?
Bought mine on ebay from China. On Jun 30, 2013 1:55 PM, "rob_kay14758" <rob_kay14758@...> wrote: **
Just building the IK3OIL frequency counter/vfo fll, struggling in the u.k.
to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks
Rob
[Non-text portions of this message have been removed]
|
Re: binocular cores - to twist or not to twist!
I found a picture while I was looking for something else. This stuff works great and sure is easy to use.
Leonard
toggle quoted message
Show quoted text
--- In BITX20@..., "Leonard" <dredger@...> wrote:
I have a few rolls of what looks like 30ga ribbon cable. It was used in hard drives. I've posted pictures of it in the past but can't find them. It's my wire of choice for torroids. It was expensive though on the retail market.
Leonard
--- In BITX20@..., Jim <n6otq@> wrote:
Add to all this -- twist your windings and it makes it a lot easier to wind.
73
Jim N6OTQ?
________________________________
From: Raj <vu2zap@>
To: BITX20@...
Sent: Saturday, June 29, 2013 7:42 AM
Subject: RE: [BITX20] binocular cores - to twist or not to twist!
Ahem! elaborating for Sandeep..
Twisted pairs have lesser capacitance with the next turn or layer than untwisted pairs of wires AFAIK!
Twisted pairs in balanced configuration also reduces the stray signal pickup from nearby circuits/radiators.
73
--
Raj, vu2zap
|
Alternative To BB204 Varicap In IK3OIL FLL?
Just building the IK3OIL frequency counter/vfo fll, struggling in the u.k. to find BB204 double varicap, can anyone suggest an alternative?
Many Thanks
Rob
|
PA on a different frequency
I got the exciter working great. I moved on to the PA. I'm using the Mod of Farhan to increase the power to 15 watts. This adds an inductor and two capacitors to form a pi network on the gate of the IRF510. I followed directions and wound a 13 turn toroid on a 37-6 core and used the right capacitors. I have about 17 watts output but not on the right frequency. The exciter's VFO is at 14,300 but the output frequency into my dummy load is at 14,550.
When I checked the exciter on my big rig it was right on freq, but when I checked the PA it was up at 14'550. What did I do wrong?
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Re: can any one provide me the inductance value of the coils used in bitx20 v3
Op 30-jun.-2013, om 03:06 heeft {vu3sxn} - shubham tiwari het volgende geschreven: BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun core..
thanks
shubham tiwari
vu3sxn
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
|
Re: can any one provide me the inductance value of the coils used in bitx20 v3
toggle quoted message
Show quoted text
Op 30-jun.-2013, om 03:06 heeft {vu3sxn} - shubham tiwari het volgende geschreven: BITX20hi,
I am trying to construct my bitx20 v3,and I cannot find the insulated copper wire of the same gauge in my local market,
can any one provide me the inductance value of the coils used in bitx20 v3,
T1,T1A,T2,T3, the circuit says 13 turns of 32 swg gauge wire on tv balun core..
thanks
shubham tiwari
vu3sxn
|
Leonard
Todd K7TFC