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Binocular cores
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Ashhar Farhan
the cores are still with me. time to move my bottom and call up a courier service to send it off to hans.
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hans, can you mail me ur address? - farhan On Fri, 27 Aug 2004, Mike W wrote:
There was mention that Farhan was going to make a quantity of the |
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Mike W
There was mention that Farhan was going to make a quantity of the
binocular cores available to the list. Has anything come of this ?. I'm just about to start construction of the BITX20, hardest part first.. the VFO using the FET based design from Farhans dual Band rig. If UK based then have a good Bank Holiday, otherwise merely 72/73 de G8NXD |
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Hans Summers
Sure - it's following via private email.
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Hans -----Original Message-----
From: Ashhar Farhan [mailto:farhan@...] Sent: 27 August 2004 07:02 To: BITX20@... Subject: Re: [BITX20] Binocular cores the cores are still with me. time to move my bottom and call up a courier service to send it off to hans. hans, can you mail me ur address? - farhan On Fri, 27 Aug 2004, Mike W wrote: There was mention that Farhan was going to make a quantity of the Yahoo! Groups Links |
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Rahul Srivastava
Hi!
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A pack of 500 with me too just in case. Got?some surplus (100+) prewounded Balun transformers imported ,Japanese. Just for the?core alone.?
Possibly of slightly better core quality than the Indian stuff.
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I have also designed a new PCB with 10mm can type coils in frontend hopefully some may prefer this option. Uploading them under files in my? PCB folder.
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73
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Rahul VU3WJM
Ashhar Farhan wrote: the cores are still with me. time to move my bottom and call up a courier
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Did these ever make it to the UK? Who?
I'd like to start to build my own rig . Unless has anyone got an alternative using (stacked?) ferrite ring cores instead? 73 Dom --- In BITX20@..., Ashhar Farhan <farhan@p...> wrote: courier service to send it off to hans.this ?. 72/73 de G8NXD |
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Mike W
The G-QRP club have binocs for sale at the moment, I quote from Sprat No.124
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BN43-2402 1 ukp for five, I think these are binocs but not sure BN43-302 2 ukp for five, these certainly are. they also have a good range of FT and T series toroids available at good prices. have a look on their web shop for specific postage details.. hth, Mike G8NXD qthr -- On 17 Oct 2005 at 10:57, dombaines wrote:
Did these ever make it to the UK? Who? |
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Hans Summers
No - I don't think Farhan was able to send them in the end. But as Mike
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says, the GQRP club have some at the minute. Another alternative is to use a toroid as Farhan advised in his web page. I think it was FT43 but my memory is dodgey :-( 73 Hans G0UPL -----Original Message-----
From: dombaines [mailto:dombaines@...] Sent: 17 October 2005 11:58 To: BITX20@... Subject: [BITX20] Re: Binocular cores Did these ever make it to the UK? Who? I'd like to start to build my own rig . Unless has anyone got an alternative using (stacked?) ferrite ring cores instead? 73 Dom --- In BITX20@..., Ashhar Farhan <farhan@p...> wrote: courier service to send it off to hans.this ?. 72/73 de G8NXD |
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Hans Summers
Also while I remember - in case it's any use to any of you:
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I have a significant quantity of large ferrite TUBES, two of which I guess could be stuck together to make a binocular core. It would be rather large, I think too big for the BITX application, and more the kind of thing I'd imagine seeing in a QRO amplifier. The tube is 28mm long and has diameter 14mm outside, 10mm inside (i.e. the wall thickness is 2mm). Any use to anyone? 73 Hans G0UPL -----Original Message-----
From: Hans Summers [mailto:Hans.Summers@...] Sent: 17 October 2005 12:10 To: 'BITX20@...' Subject: RE: [BITX20] Re: Binocular cores No - I don't think Farhan was able to send them in the end. But as Mike says, the GQRP club have some at the minute. Another alternative is to use a toroid as Farhan advised in his web page. I think it was FT43 but my memory is dodgey :-( 73 Hans G0UPL -----Original Message----- From: dombaines [mailto:dombaines@...] Sent: 17 October 2005 11:58 To: BITX20@... Subject: [BITX20] Re: Binocular cores Did these ever make it to the UK? Who? I'd like to start to build my own rig . Unless has anyone got an alternative using (stacked?) ferrite ring cores instead? 73 Dom --- In BITX20@..., Ashhar Farhan <farhan@p...> wrote: courier service to send it off to hans.this ?. 72/73 de G8NXD |
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Steve Hartley
Dom
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I bought mine from Robin at Sycom. I have the part number somewhere if you need it. 73, Steve, G0FUW ----- Original Message -----
From: "dombaines" <dombaines@...> To: <BITX20@...> Sent: Monday, October 17, 2005 11:57 AM Subject: [BITX20] Re: Binocular cores Did these ever make it to the UK? Who? |
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Rahul Srivastava
Hi!
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Binocular cores at VU are just marginal stuff. Not at all at par with Amidon or Fair Rite cores.
The BB transformers can be easily made on a couple of ferrite beads.
Given that BITX involved some unique innovations due to lack of availability of components I suggest replace the binoc. cores with some torroids salvaded from electronic CFL tube ballasts 8 -10 turns ought to be enough for adequate performance.
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73
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Rahul VU3WJM
dombaines wrote: Did these ever make it to the UK? Who?
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