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#1
October 11th 17, 12:58 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
I have the 9 MHz Xtal filters for SSB and for CW from
the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. |
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#2
October 11th 17, 01:49 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
On Wed, 11 Oct 2017 11:58:03 +0100, Gareth's Downstairs Computer wrote:
I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. +1 |
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#3
October 11th 17, 04:46 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
In message , Gareth's Downstairs Computer
writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. I had a look in the Junk mine. Closest I have is 8543.82 Brian -- Brian Howie |
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#4
October 11th 17, 06:11 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
On 11/10/2017 15:46, Brian Howie wrote:
In message , Gareth's Downstairs Computer writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. I had a look in the Junk mine. Closest I have is 8543.82 Thanks for that stimulation, for anything that heterodynes into the tuning range of 455 to 470 kHz IFTs will do nicely, and I'm sure that I've loads in that range. |
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#5
October 11th 17, 06:58 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
In message , Gareth's Downstairs Computer
writes On 11/10/2017 15:46, Brian Howie wrote: In message , Gareth's Downstairs Computer writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. I had a look in the Junk mine. Closest I have is 8543.82 Thanks for that stimulation, for anything that heterodynes into the tuning range of 455 to 470 kHz IFTs will do nicely, and I'm sure that I've loads in that range. Let me know if you want it; It's HC6/U. Going through the box I have loads of ex PMR 11.155 MHz that do the same conversion for 10.7MHz first IF. Brian -- Brian Howie |
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#6
October 11th 17, 07:44 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
On 11/10/2017 17:58, Brian Howie wrote:
In message , Gareth's Downstairs Computer writes On 11/10/2017 15:46, Brian Howie wrote: In message , Gareth's Downstairs Computer writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. Â*I had a look in the Junk mine. Closest I have is 8543.82 Thanks for that stimulation, for anything that heterodynes into the tuning range of 455 to 470 kHz IFTs will do nicely, and I'm sure that I've loads in that range. Let me know if you want it; It's HC6/U. Going through the box I have loads of ex PMR 11.155 MHz that do the same conversion for 10.7MHz first IF. Thank-you Brian, but I've loads of 8.86 (twice the 4.43361875 PAL colour sub carrier) giving me 140 ish kHz and a couple of scrap "geranium" LW RXs to suit. |
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#7
October 12th 17, 12:15 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
In message , Gareth's Downstairs Computer
writes On 11/10/2017 17:58, Brian Howie wrote: In message , Gareth's Downstairs Computer writes On 11/10/2017 15:46, Brian Howie wrote: In message , Gareth's Downstairs Computer writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. *I had a look in the Junk mine. Closest I have is 8543.82 Thanks for that stimulation, for anything that heterodynes into the tuning range of 455 to 470 kHz IFTs will do nicely, and I'm sure that I've loads in that range. Let me know if you want it; It's HC6/U. Going through the box I have loads of ex PMR 11.155 MHz that do the same conversion for 10.7MHz first IF. Thank-you Brian, but I've loads of 8.86 (twice the 4.43361875 PAL colour sub carrier) giving me 140 ish kHz and a couple of scrap "geranium" LW RXs to suit. You need a 140KHz CIO , but it could be LC down there. Brian -- Brian Howie |
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#8
October 12th 17, 04:17 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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Source of 9.455 or 8.545 MHz Xtals?
On 12/10/2017 11:15, Brian Howie wrote:
In message , Gareth's Downstairs Computer writes On 11/10/2017 17:58, Brian Howie wrote: In message , Gareth's Downstairs Computer writes On 11/10/2017 15:46, Brian Howie wrote: In message , Gareth's Downstairs ComputerÂ* writes I have the 9 MHz Xtal filters for SSB and for CW from the GQRP club for one of my RX projects, but for AM and FM reception thought I'd heterodyne down to 455KHZ where it's easier to manage the appropriate bandwidths. Â*I had a look in the Junk mine. Closest I have is 8543.82 Thanks for that stimulation, for anything that heterodynes into the tuning range of 455 to 470 kHz IFTs will do nicely, and I'm sure that I've loads in that range. Â*Let me know if you want it; It's HC6/U. Going through the box I have loads of ex PMR 11.155 MHz that do the same conversion for 10.7MHz firstÂ* IF. Thank-you Brian, but I've loads of 8.86 (twice the 4.43361875 PAL colour sub carrier) giving me 140 ish kHz and a couple of scrap "geranium" LW RXs to suit. You need a 140KHz CIO , but it could be LC down there. Or even Sallen and Key with todays' low noise devices |
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