Re: A more stable Bitx40 (fun with ceramic resonators)
Looks like Mouser has a 4.8mhz Ceramic Resonator, which would put it at 7200khz.
CSTLS4M80G53-B0 Murata Electronics | Mouser
By
Ryan Flowers
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#19445
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Re: BPF's
Clear coat is what I have handy. Wanted something quick and easy to use.
73
Ken VA3ABN
[BITX20] <BITX20@...> wrote:
By
Ken
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#19444
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Re: BPF's
Why not use coil dope? The commercial stuff isn't cheap, but it's just polystyrene dissolved in MEK, so not hard to make.
RichKC8MWG
By
Richard Andrew Knack
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#19443
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BPF's
I am building up my own external BPF's for 80/40/20. I need to coat the
windings to hold them in place. Can I use a spray clear coat? Will it
affect the inductance?
73
Ken VA3ABN
By
Ken
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#19442
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Re: A more stable Bitx40 (fun with ceramic resonators)
This is where i get mine, http://www.thepartsplace.k5nwa.com/index.php?route=product/category&path=68
Joel KB6QVI
By
Joel Caulkins/N6ALT
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#19441
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Re: A more stable Bitx40 (fun with ceramic resonators)
The usual suspects: Mouser, Digikey, Farnell, and Jameco.
Todd K7TFC
BITX20@...> wrote:
By
Todd K7TFC
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#19440
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Re: A more stable Bitx40 (fun with ceramic resonators)
What is a good source in the US for a ceramic resonator?
By
KC8WBK
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#19439
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Ashhar Farhan CNN Intervew (08-May-05, 20:00 UTC)
Hi Colleagues
Please, can someone have available this interview?
-Ashhar Farhan was interviewed for a CNN report (08-May-05, 20:00 UTC) on the Amateur Radio contribution to the Asian Tsunami
By
co6bg@...
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#19438
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Re: troubleshooting the bitx40 receiver
Microwave that tap washer alongside a glass of water.
A microwave oven needs something to absorb all that energy.
I once tried microwaving half the recommended amount of popcorn.
The magnetron
By
Jerry Gaffke
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#19437
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Re: tuning step size for the SI5351 / Radunio version
VU2DEV was also trying as to use a carbon Pot with link below, a couple of
weeks ago.
http://hamrmipl.blogspot.in/p/ddsdirect-digital-synthesizer-using.html?m=1
Also got codes for 20 Meter for above
By
Sandeep Lohia
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#19436
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Re: tuning step size for the SI5351 / Radunio version
It could definitely be annoying if the tuning rate isn't set to your preferences. I used symbolic constants (e.g., #define INCREMENT) to set the increment and the time delay in the code before the
By
Jack Purdum <econjack@...>
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#19435
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Re: tuning step size for the SI5351 / Radunio version
Ha haa, that's true Todd :D
Pardon, bit off topic ;)
Jerry, I used kind of this
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Sandeep Lohia
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#19434
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Re: tuning step size for the SI5351 / Radunio version
The encoder with variable increment step could be made to work well.
On the other hand, I have a Tecsun consumer radio that does that and it annoys me no end
how it more or less arbitrarily flips
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Jerry Gaffke
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#19433
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Re: tuning step size for the SI5351 / Radunio version
Jerry:
See my earlier post (19785Re: [BITX20] tuning step size) on the 26th about using the spin rate of the encoder?shaft to automatically change the increment step.
Jack, W8TEE
To:
By
Jack Purdum <econjack@...>
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#19431
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Re: tuning step size for the SI5351 / Radunio version
Jerry
I had switched my vfo to a DDS, so I have no experience with the pot as an
encoder.
I did find my volume very scratchy and switched to a new audio taper pot.
73
Ken
By
Ken
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#19432
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Re: tuning step size for the SI5351 / Radunio version
Because the fun is in the inventing, not just owning, the wheel. ;-).
73,
Todd K7TFC
By
Todd K7TFC
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#19430
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Re: BITX40 - 50Khz birdies
Possibly from oscillator of Arduino? Or if the LCD has an LED back light. I have noticed LEDs that light up my microphone buttons do this.
Regards
Dave
G4UFS
By
d p
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#19429
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BITX40 - 50Khz birdies
Hi,
BITX40 and Arduino connected. LCD 16x2 and rotary encoder.
Notice there are some birdies at approx 50Khz distance.
Anybody noticed this also and know the root cause?
Ron - PA3FAT
By
ron van doremalen (PA3FAT)
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#19428
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Re: tuning step size for the SI5351 / Radunio version
Anybody having trouble with noisy pots on their Bitx?
I'm happy with the volume controls on the consumer gear I have, I assume they are all carbon. Though after years of use, they can get
By
Jerry Gaffke
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#19427
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Re: Tracking shipment
Thanks, Ron,
Good information!
Roy
WA0YMH
[BITX20]" <BITX20@...> wrote:
By
Roy Appleton
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#19426
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