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Components round 2
All components arrived here today. I have counted them all out into the
component packs and despatched them.
Note that I have two spare packs, if any latecomers would like one: price is
£8 + £0.28 UK
All components arrived here today. I have counted them all out into the
component packs and despatched them.
Note that I have two spare packs, if any latecomers would like one: price is
£8 + £0.28 UK
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By
Hans Summers
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HP Parts Xref
I found it (surprised myself). It's now in the file section in a folder named "hp_parts_xref".
Six .gifs, all about 250K.
I found these files on the internet a few years ago and as far as I know i
I found it (surprised myself). It's now in the file section in a folder named "hp_parts_xref".
Six .gifs, all about 250K.
I found these files on the internet a few years ago and as far as I know i
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By
Jim
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L1 and L2 on PA diagram
Hi all
Looking at the PA diagram it is indicated that from the antenna there
are two inductors L1 and L2 but the details below indicate L4 and L5.
Can anyone confirm that L1 = L4 and L2 = L5
73 G
Hi all
Looking at the PA diagram it is indicated that from the antenna there
are two inductors L1 and L2 but the details below indicate L4 and L5.
Can anyone confirm that L1 = L4 and L2 = L5
73 G
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By Charles Darley
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The prince of FETs
I agree with all Jim's comments about the use of FET's salvaged from PSU's
etc in power amplifiers for bands 40m or below. I always like to use
"recycled" components wherever possible.
But when it co
I agree with all Jim's comments about the use of FET's salvaged from PSU's
etc in power amplifiers for bands 40m or below. I always like to use
"recycled" components wherever possible.
But when it co
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By
Hans Summers
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Resonance Calculator Tool 3 messages
In the "files" section of this forum I have uploaded a small
spreadsheet program called "RESONANCE CALCULATOR.xls". This is a
spreadsheet program that helps calculate inductance, capacitance, or
freq
In the "files" section of this forum I have uploaded a small
spreadsheet program called "RESONANCE CALCULATOR.xls". This is a
spreadsheet program that helps calculate inductance, capacitance, or
freq
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By
Arvid Evans
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BAND selection 3 messages
Dear Forum,
Suppose I plan to have some band selection in future,
after 'original' 14 MHz has been set up.
I just need confirmation about my frequency 'plan' table
below,
is this correct in
Dear Forum,
Suppose I plan to have some band selection in future,
after 'original' 14 MHz has been set up.
I just need confirmation about my frequency 'plan' table
below,
is this correct in
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By
Ashhar Farhan
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Inductance meter
Hi all
Saw this page whilst searching the web
http://www.web-ee.com/Schematics/Inductance%20Meter/Inductance%
20Meter.htm
It describes the construction of a simple inductance meter which is
an add
Hi all
Saw this page whilst searching the web
http://www.web-ee.com/Schematics/Inductance%20Meter/Inductance%
20Meter.htm
It describes the construction of a simple inductance meter which is
an add
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By Charles Darley
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BITX-xx Frequency Calculator
A quick frequency calculation spreadsheet for the BITX-xx has been placed in the FILES section under K7HKL/BITX....
This should help resolve some of the questions regarding alternative IF Filter fr
A quick frequency calculation spreadsheet for the BITX-xx has been placed in the FILES section under K7HKL/BITX....
This should help resolve some of the questions regarding alternative IF Filter fr
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By
Arv Evans
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Inductance Meter 3 messages
Hi all
I note that the post has separated part of the url from the web page
mentioned - let's try again ----
www.web-ee.com/Schematics/Inductance%20Meter/Inductance%20Meter.htm
You need all witho
Hi all
I note that the post has separated part of the url from the web page
mentioned - let's try again ----
www.web-ee.com/Schematics/Inductance%20Meter/Inductance%20Meter.htm
You need all witho
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By Charles Darley
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Bitx 20, Help me! 10 messages
Please I do not have the 10MHz crystals to make the filter, but I
have 5 pieces of 8MHz crystals with this 8MHz crystals is possible to
make the filter with new values of resistor and capacitor?And
Please I do not have the 10MHz crystals to make the filter, but I
have 5 pieces of 8MHz crystals with this 8MHz crystals is possible to
make the filter with new values of resistor and capacitor?And
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By
felipetanaweb
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New file uploaded to BITX20
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the BITX20
group.
File : /K7HKL/BITX20 FREQUENCY CALCULATION SPREADSHEET.xls
U
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the BITX20
group.
File : /K7HKL/BITX20 FREQUENCY CALCULATION SPREADSHEET.xls
U
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By
BITX20@...
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Trifilar Twister Tool 4 messages
Hi
Twisting the wires together for winding trifilar inductors is made easier with a simple tool built for that purpose. A picture of my "Trifilar Twister Tool" is attached to this email. A copy o
Hi
Twisting the wires together for winding trifilar inductors is made easier with a simple tool built for that purpose. A picture of my "Trifilar Twister Tool" is attached to this email. A copy o
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By
Arv Evans
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Toriod Q
Has anyone measured the Q of the toriods? I wondered whether it
mattered too much provided the winding details were observed.
However care has to be taken with the coating materials.
There is an int
Has anyone measured the Q of the toriods? I wondered whether it
mattered too much provided the winding details were observed.
However care has to be taken with the coating materials.
There is an int
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By
m1dgs
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Inexpensive capacitor measurements... 2 messages
Hi
Since Farhan's stated original intent in designing the BITX20 was to provide an inexpensive transceiver, maybe it would be appropriate to show BITX builders an inexpensive way to measure unmarke
Hi
Since Farhan's stated original intent in designing the BITX20 was to provide an inexpensive transceiver, maybe it would be appropriate to show BITX builders an inexpensive way to measure unmarke
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By
Arv Evans
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Toroids have legs! ;-) 5 messages
Hi
In converting the BITX20 design for building my BITX40 transceiver I found myself 'experimenting' with several different sets of air-core toroid inductors. Soldering, removing, & re-soldering th
Hi
In converting the BITX20 design for building my BITX40 transceiver I found myself 'experimenting' with several different sets of air-core toroid inductors. Soldering, removing, & re-soldering th
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By
Arv Evans
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[AQRP] FW: Inexpensive capacitor measurements...
Thanks a million, Monty, Great job. And thanks to Arv Evans for sharing
this circuit :-)
Regards,
John
=============================================
email: k5jhf@...
photos: http://photos.ya
Thanks a million, Monty, Great job. And thanks to Arv Evans for sharing
this circuit :-)
Regards,
John
=============================================
email: k5jhf@...
photos: http://photos.ya
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By
John Fisher
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Cleaning PC Board material for your BITX transceiver construction 6 messages
Hi
PC Board material that is stored for some time usually takes on a layer of oxidation that hinders soldering components to its surface. In the past I have routinely used sandpaper to remove this
Hi
PC Board material that is stored for some time usually takes on a layer of oxidation that hinders soldering components to its surface. In the past I have routinely used sandpaper to remove this
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By
Arv Evans
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Relay question Help!
Do you Yahoo!?
New and Improved Yahoo! Mail - Send 10MB messages!
Do you Yahoo!?
New and Improved Yahoo! Mail - Send 10MB messages!
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By Rahul Srivastava
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Inexpensive plastic screwdriver 6 messages
Hi,
following Arv Evans's useful tips I would like to share with you how I
built a non-conductive screwdriver to regulate capacitor trimmers.
A quick glance at the BITX20 schematic did not reveal an
Hi,
following Arv Evans's useful tips I would like to share with you how I
built a non-conductive screwdriver to regulate capacitor trimmers.
A quick glance at the BITX20 schematic did not reveal an
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By
Paolo Cravero as2594
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BITX20 & BITX40 4 messages
Hello to the BITX20 group (this is my first posting on this forum).
Farhan and myself have exchanged a couple of off-forum emails regarding mods to his excellent design. One interesting possibility
Hello to the BITX20 group (this is my first posting on this forum).
Farhan and myself have exchanged a couple of off-forum emails regarding mods to his excellent design. One interesting possibility
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By
arvevans@...
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