I found these in my junk box
Hi
The last time this item surfaced, I was selling it for a dollar a foot. I think I can do that again.
It's a reel of 20 pF NP0 disc capacitors on paper tape, with 1 inch leads, 24 per foot.
By
Jim Strohm <jstrohm@...>
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#968
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Re: New to group and Query
Thanks Rahul
Jim VE3DDY
higher gain and lower NF. So the pin out is B-E-C which is different
from other transistors. C-B-E L-R for other devices. For 2SC2570
you cab also substitute BFR90.91,96 or
By
bambazonke01 <jimandruth@...>
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#967
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Re: New to group and Query
Hi!
For those going in for ver3 board , I once again repeat the mods.
1) Q1 I have used 2SC2570A a high ft cable TV transistor for higher gain and lower NF. So the pin out is B-E-C which is
By
Rahul Srivastava <vu3wjm@...>
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#966
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Re: New to group and Query
The Far circuits boards are away too big for my application so I'm
strongly considering a run of the CCA design by VU3WJM (Rahul).
This board design is 6.5 X 4.25 inches and will fit nicely inside
By
bambazonke01 <jimandruth@...>
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#965
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Re: New to group and Query
Hello,
This may not be of help to everyone but for North Americans
it would be handy to know.
FAR circuits www.farcircuits.net
They have the the BIT-X board as drawn by the creator.
The one I
By
ajparent1 <kb1gmx@...>
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#964
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Re: New to group and Query
Hi! Friends
Unfortunately we have still not managed to get the BITX PCB commercialy manufactured even though it is quite cheap getting it done here.
Secondly postage from India is also rather
By
Rahul Srivastava <vu3wjm@...>
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#963
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Re: New to group and Query
Hi Arv, and Group,
I've been looking at the CCA Version 3 by VU3WJM as it fits the 884
packset like a glove. I have to find someone who has that board
available or else gear up to make my own. I've
By
bambazonke01 <jimandruth@...>
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#962
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Re: New to group and Query
Jim VE3DDY
One of my BITX units is built on a 7 inch by 4 inch PCB, including the
PTO/VFO, a Huff & Puff stabilizer, and three additional transistors for T/R
power switching. It is a bit tight, but
By
Arv Evans <arvevans@...>
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#961
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New to group and Query
Hi BIT-X'ers,
My name is Jim and I'm new to the group.
I'm a Canadian Radio Amateur and an avid experimenter.
I have an old Chinese type 884 VHF radio packset into which I'd like
to install a Bit-X
By
bambazonke01 <jimandruth@...>
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#960
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Re: BITX in 2m band
Hello,
I have also done transverter for 2M in the past as well as 2m
RX designs.
A good filter for 2m can be done with 3 coils of helix design
using aperture (window) coupling. Constuction is a 3
By
ajparent1 <kb1gmx@...>
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#959
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Re: BITX in 2m band
Hello,
Harmonics resulting from mixer operation are not a problem if
circuits are run linear with attention to correct signal levels.
Attention to filtering is a requirement and at 2M leads must be
By
ajparent1 <kb1gmx@...>
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#958
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Re: BITX in 2m band
wrote:
filter
different
Good... good question. ;-)
The Yaesu FT-290R have 4 passaband filters sintonized at 144MHz with
the aid of varicaps as output of mixer (it has also a ring diodes
mixer), it
By
eb7hpm
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#957
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Re: BITX in 2m band
Hi
Great to read about your BITX developments!
I have one concern, though: will it be possibile to efficiently filter out unwanted harmonics +-n*10MHz at 144 MHz?
I think VHF&up transceivers use
By
Paolo Cravero as2594 <pcravero@...>
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#956
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BITX in 2m band
Greetings to fellows BITX'ers.
The other day I was testing a VCO for the range of 144MHz with the
interest of making work the BITX in 2m. The VCO oscillates from 125
to 145MHz approximately with a
By
eb7hpm
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#955
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35w 2 x irf 510 pa
http://www.hfprojects.com/projects/hfpacker/HFPackerAmp.pdf
By
Max
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#954
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Re: I am interested in EB7HPM PLL
Dear Manuel:
I want to be grateful to you for your courtesy in giving me the
information for the construction of the VFO and second for the advices
towards the group. In the weekend I will be
By
CARLOS EDUARDO MOSCA
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#953
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Re: I am interested in EB7HPM PLL
I'm Sorry Carlos, but the group's language is English. You may
prioritary to post in english. The mayority of others members only
understand english. Good, You must compose the message in
By
eb7hpm
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#952
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INTERESADO EN PLL DE EB7HPM
ESTIMADO MANUEL:
AL FINALIZAR CON EXITO LA CONSTRUCCION DEL BITX ME ENCONTRE CON LA
DIFICULTAD DE HALLAR UN CIRCUITO VFO QUE SEA ESTABLE A ALTA FRECUENCIA.
INICIALMENTE EL XCVER LO AJUSTE EN LA BANDA
By
CARLOS EDUARDO MOSCA
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#951
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mini Ring Core Calculator
http://www.qsl.net/dl5swb/minirk_e.htm
The easy way to calculate toroid cores.
mini Ringkern-Rechner V. 1.0 was first published in German Amateur
Radio Magazin "FUNKAMATEUR" 11/2000.
The program
By
Max
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#950
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Need Spare PCBS...
Hello All.....
Anyone dealing with spare bitx pcbs do elet me know via mail your
adress.I've tried contacting vu2pep but i got no replies.........
pls contact me at:
ragav_rocks@...
By
ragavan
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#949
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