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Tap Washers
Hi All, Just to clarify, the Delta Washers I mentioned in the earlier
post are shaped more like a standard Torroid a little bigger than a T
50 and not as big as a T68 so I guess around a T55????? A st
Hi All, Just to clarify, the Delta Washers I mentioned in the earlier
post are shaped more like a standard Torroid a little bigger than a T
50 and not as big as a T68 so I guess around a T55????? A st
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By
Bill Schofield
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Rig photos
Hi
I uploaded my BITX20 pictures into the photographs section
http://photos.groups.yahoo.com/group/BITX20/lst
I also re-organised in there a little, so that the photos which were at the
top level ar
Hi
I uploaded my BITX20 pictures into the photographs section
http://photos.groups.yahoo.com/group/BITX20/lst
I also re-organised in there a little, so that the photos which were at the
top level ar
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By
Hans Summers
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manhattan style pads 6 messages
I've been using ugly-style construction,
which has worked quite well. I've noticed
a bunch of constructors have used Manhattan-
style construction. Not being willing to
leave well enough alone, I wa
I've been using ugly-style construction,
which has worked quite well. I've noticed
a bunch of constructors have used Manhattan-
style construction. Not being willing to
leave well enough alone, I wa
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By
nd8i
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BITX20 component list 2 messages
Hi!
Has anyone attempted to list all BITX20 components? I haven't found
any link on Ashan's page. Here is my attempt at listing all
components, except for the IRF510 PA (had no time).
Please warn me
Hi!
Has anyone attempted to list all BITX20 components? I haven't found
any link on Ashan's page. Here is my attempt at listing all
components, except for the IRF510 PA (had no time).
Please warn me
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By
ik1zyw
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TV Balun
Hello, I have uploaded a photo of a two-hole "binocular" ferrite
core (see G4DFV album). Ashtar, please can you tell me if this is
anything like the TV balun that you have used?
My core measures 13m
Hello, I have uploaded a photo of a two-hole "binocular" ferrite
core (see G4DFV album). Ashtar, please can you tell me if this is
anything like the TV balun that you have used?
My core measures 13m
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By
g4dfv2004
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Off topic - i am blocked out 3 messages
for the last 48 hours, groups.yahoo.com has been blocked out by the two
major bandwidth providers to india. most of my internet accounts belong to
isps that in turn take their bandwidth from either of
for the last 48 hours, groups.yahoo.com has been blocked out by the two
major bandwidth providers to india. most of my internet accounts belong to
isps that in turn take their bandwidth from either of
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By
Ashhar Farhan
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non-ferrite balun cores
BITXers
Since the tap washers, faucet washers here in the US, are mylon or
similar plastic type material, it would seem that they do not
contribute much to the functionality, other that to hold the w
BITXers
Since the tap washers, faucet washers here in the US, are mylon or
similar plastic type material, it would seem that they do not
contribute much to the functionality, other that to hold the w
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By
Arvid Evans
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A tale of two tap washers 2 messages
...in which G0UPL travels to his local hardware store to further investigate
the nature of the infamous tap washers, and in particular the differences
between ordinary and "delta" washers. Samples wer
...in which G0UPL travels to his local hardware store to further investigate
the nature of the infamous tap washers, and in particular the differences
between ordinary and "delta" washers. Samples wer
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By
Hans Summers
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A tale of two tap washers...the saga goes on, an on
Sam & other BITXers
Your measurements explain my results then. Instead of tap/faucet
washers I used 1/4 inch slices cut from "1/2 inch" PVC pipe (the
schedule-40 or medium-thick-wall type). These m
Sam & other BITXers
Your measurements explain my results then. Instead of tap/faucet
washers I used 1/4 inch slices cut from "1/2 inch" PVC pipe (the
schedule-40 or medium-thick-wall type). These m
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By
Arvid Evans
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Block Diagram 2 messages
Hi
I have just posted a block diagram of the BITX - I hope I have
correctly identified all the section of the main schematic diagram.
Let me know of any errors.
This will be used as part of a tea
Hi
I have just posted a block diagram of the BITX - I hope I have
correctly identified all the section of the main schematic diagram.
Let me know of any errors.
This will be used as part of a tea
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By Charles Darley
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Chip pad 6 messages
Hi
I was wondering how to make a pad for the chip then thought use a
piece of PCB with a cut through the copper in the centre and then
additional cross cuts of the copper to make the lands for the
Hi
I was wondering how to make a pad for the chip then thought use a
piece of PCB with a cut through the copper in the centre and then
additional cross cuts of the copper to make the lands for the
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By Charles Darley
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Inductors - RX Probs 2 messages
Hi all
Looking for some help here.
Testing the RX today, AF amp clearly OK, the simple tests in the text work
out fine i.e. Touch base Q4 static, Q3 more static, Q2 less static. Trimmers
with L1,2 &
Hi all
Looking for some help here.
Testing the RX today, AF amp clearly OK, the simple tests in the text work
out fine i.e. Touch base Q4 static, Q3 more static, Q2 less static. Trimmers
with L1,2 &
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By
Mark Jones
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Digital dial for BITX20 using PIC 3 messages
Hi fellow builders,
posting this link for information
http://www.wia.org.au/armag/2002/AR_Sept02_Digital_Freq_Display.pdf
- its a digital frequency readout using a PIC micro with user
definable IF off
Hi fellow builders,
posting this link for information
http://www.wia.org.au/armag/2002/AR_Sept02_Digital_Freq_Display.pdf
- its a digital frequency readout using a PIC micro with user
definable IF off
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By
vk3bfa
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Components, 2nd round
BITX'ers,
DEADLINE: 12:00 UTC THURSDAY 01-JUL-04 (TOMORROW!)
Paolo, Farhan and myself are investigating the possibility of a complete kit
of all parts for the project, including resistors, capacitor
BITX'ers,
DEADLINE: 12:00 UTC THURSDAY 01-JUL-04 (TOMORROW!)
Paolo, Farhan and myself are investigating the possibility of a complete kit
of all parts for the project, including resistors, capacitor
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By
Hans Summers
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Crystal filter passband shape
the shape is easy to figure out if you already know the crystal
parameters. the crystal parameters are easier to measure now thanks
to the G3UUR method. i have outlined it at
http://www.phonestack.
the shape is easy to figure out if you already know the crystal
parameters. the crystal parameters are easier to measure now thanks
to the G3UUR method. i have outlined it at
http://www.phonestack.
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By
ashhar_farhan
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10 MHz crystal matching 3 messages
Hello,
I just measured the resonance frequency of ten 10 MHz crystals. I found a
set of four within 30 Hz and another set of four within 45 Hz.
How does this compare to other peoples results?
Di
Hello,
I just measured the resonance frequency of ten 10 MHz crystals. I found a
set of four within 30 Hz and another set of four within 45 Hz.
How does this compare to other peoples results?
Di
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By
Heinz Schnait
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level and wave shape after balans mixer? 5 messages
Hi,
I build some parts of the transceiver and tested every part
individualy.
The LF parts works fine (a pitty the schematic is not corrected with
the voltage/output of the lm386). If I add a sinus L
Hi,
I build some parts of the transceiver and tested every part
individualy.
The LF parts works fine (a pitty the schematic is not corrected with
the voltage/output of the lm386). If I add a sinus L
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By Chris van den Berg
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Components
The order for the 2nd round of components is now in. With any luck, they
arrive tomorrow and I despatch them to you tomorrow. Due to a shortage of
2N2219 at Viewcom I ordered the real 2N2218 from Mode
The order for the 2nd round of components is now in. With any luck, they
arrive tomorrow and I despatch them to you tomorrow. Due to a shortage of
2N2219 at Viewcom I ordered the real 2N2218 from Mode
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By
Hans Summers
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PTO/VFO for BITX40
BITXers
There are several alternative ways to build various parts of the BITX
design. For my BITX40 I chose a PTO type oscillator for the VFO.
This uses a layout similar to that done by Jom - WA6OT
BITXers
There are several alternative ways to build various parts of the BITX
design. For my BITX40 I chose a PTO type oscillator for the VFO.
This uses a layout similar to that done by Jom - WA6OT
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By
Arvid Evans
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- Correct schematics
Ashtar, I have followed the link to your site:-
www.phonestack.com/farhan
and the schematic around the LM386 still looks the same as before.
Duncan G4DFV
Ashtar, I have followed the link to your site:-
www.phonestack.com/farhan
and the schematic around the LM386 still looks the same as before.
Duncan G4DFV
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By
g4dfv2004
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