Thanks Nick and Raj.
Nick, perhas you could manage GIsheet recovered from some beer container, cut and make a rectangular shield? abd try toplace above the VFO section and solder to ground track somewhere closeby. Also have a small sheet of VFO section area? have some extra leads or wires soldered? and place at the bottom as a shield from below. ?Virtually you are going to encase the VFO section. Likewise you could also plan for BFO section. Thanks again
?sarma
vu3zmv
On Thu, Jan 26, 2017 at 6:47 PM, Rajendra Kumar G G <vu2zap@...> wrote:
I agree Nick,
In my collection I have np0/c0g in grey and toffee color.
The toffee colored ones are the higher values like 10nf. Hard to find 1nf
and higher.
Raj/vu2zap
At 26/01/2017, you wrote:
Sarma,
The NPO/C0G that I have seen tend to have a white/grey color compared to
the brown/yellow of standard types. This may be because of the material
used.
I wouldn't necessarily say that all brown ones aren't NPO/C0G though or
that this is a general rule. Just something I have taken notice to. I
could very well be wrong. I doubt there is any standard.
Hope this helps and isn't misleading.
PS: Anything conductive near the board (if it isn't already in a metal
enclosure) that can move around will detune the oscillator depending on
proximity. I have mine in a plastic box that came with it. Sitting on top
of another box that is metal, if it shifts away from this box after I
have tuned in a station it will detune it.
Unfortunately, I have yet to make a contact with it. The guys with the
800 watts or so out don't seem to hear me. Or could be my end fed wire. I
don't give up too easy.
--
Good luck,
Nick
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Re: Bitx40 buying infos request
I'd assume if you emailed them directly you could change the shipping address and other bits as needed. Personally I'd email them ahead of time and make the arraingments so they could keep a eye out for when the payment comes through.
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I agree Nick,
In my collection I have np0/c0g in grey and toffee color.
The toffee colored ones are the higher values like 10nf. Hard to find 1nf
and higher.
Raj/vu2zap
At 26/01/2017, you wrote:
toggle quoted message
Show quoted text
Sarma,
The NPO/C0G that I have seen tend to have a white/grey color compared to
the brown/yellow of standard types. This may be because of the material
used.
I wouldn't necessarily say that all brown ones aren't NPO/C0G though or
that this is a general rule. Just something I have taken notice to. I
could very well be wrong. I doubt there is any standard.
Hope this helps and isn't misleading.
PS: Anything conductive near the board (if it isn't already in a metal
enclosure) that can move around will detune the oscillator depending on
proximity. I have mine in a plastic box that came with it. Sitting on top
of another box that is metal, if it shifts away from this box after I
have tuned in a station it will detune it.
Unfortunately, I have yet to make a contact with it. The guys with the
800 watts or so out don't seem to hear me. Or could be my end fed wire. I
don't give up too easy.
--
Good luck,
Nick
|
Re: Repairing a Bitx40 transmitter fault (video)
Good video and thank you for posting!
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Re: Bitx40 buying infos request
Hi Sara,
On my package the value was showing $59 (USD). Customs fees depend on your country laws. In Canada I did not have to pay. Packet is sent using India Post.
Best of luck, Ion VA3NOI
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Sarma, The NPO/C0G that I have seen tend to have a white/grey color compared to the brown/yellow of standard types. This may be because of the material used. I wouldn't necessarily say that all brown ones aren't NPO/C0G though or that this is a general rule. Just something I have taken notice to. I could very well be wrong. I doubt there is any standard. Hope this helps and isn't misleading. PS: Anything conductive near the board (if it isn't already in a metal enclosure) that can move around will detune the oscillator depending on proximity. I have mine in a plastic box that came with it. Sitting on top of another box that is metal, if it shifts away from this box after I have tuned in a station it will detune it. Unfortunately, I have yet to make a contact with it. The guys with the 800 watts or so out don't seem to hear me. Or could be my end fed wire. I don't give up too easy. -- Good luck, Nick
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Re: Dot notation for transformers
Try this one: #209: Basics of Phase Dots on Transformer Windings
Published on Aug 11, 2015 This
video describes what the "phase dots" are that you often see adjacent
to windings of a transformer. It discusses how these dots are used in
certain circuits to establish a desired phase relationship between the
signals on the various windings. A couple of tips are given regarding
how to determine the phasing relationship on homebrew transformers.
Finally, measurements are made with an oscilloscope on a trifilar wound
transformer to see the phase relationship between the signals on each of
the windings with respect to the phasing dots. 73
On Wed, Jan 25, 2017 at 9:26 AM, Bob V <rjvnyc@...> wrote: Could someone direct me to an easy-to-understand discussion of how to interpret dots intended to clarify winding of transformers??
Perhaps there is a "transformer winding for dummies" paper somewhere?
73 Bob WA2I
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Re: Order - How to find details
Hi Kevin!
I was in your shoes. I placed the order on Dec. 24 and I have received, from Paypal, an email on Dec. 30 with information about shipping, once those were updated by HF Signals. For me it took almost three weeks from that email to get the kit. Wired it up as per instruction and everything has worked great, It is a great radio and the price is very low by any standards. For this price you will not be able to build it yourself! Yes, I had some frequency error (about 150 Hz), but I calibrated as per instructions provided on the website with one major modification: THE WIRE USED TO CALIBRATE IS THE RED WIRE NOT BROWN! If you use the brown wire nothing gets broken but it will not work. Best luck Ion VA3NOI
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Dot notation for transformers
Could someone direct me to an easy-to-understand discussion of how to interpret dots intended to clarify winding of transformers??
Perhaps there is a "transformer winding for dummies" paper somewhere?
73 Bob WA2I
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Saying Hello to everybody here and creating my first post at the same time!?
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Hello all, I am WA2I from NJ. ?I have 2 BITX from hfsignals that will be used duration a new Ham radio class for local youths. ?I cannot imagine a better way to introduce them to the hobby than with this device. ?
From Hacker to Licensed Hacker:?Get Your Ham Radio Callsign! Tuesdays,?February 7, 2017 - March 28, 2017 From?4:00 p.m. - 5:00 p.m. (for Middle and High School Students)
This program is for middle and high school students interesting in computers and computing.? Amateur Radio Operators (Hams) were the original hackers. Learn about electronics, as well as the rules and regulations for using computers to communicate via orbiting satellites or to bounce signals off of the moon!
SciencEd Foundation, which is sponsoring this program, is also involved in the development of low cost radio telescopes intended to introduce students to broader aspects of radio science and prepare them to be leaders of the 21st century.
73 Bob WA2I
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Bitx40 buying infos request
Hi all,
I want to buy a Bitx40.
I live in Italy and i have seen that the site offers a direct check-out button for PayPal.?
There are no other way to insert address for expedition or other datas.?
How do you manage the sales? Do you communicate a tracking number or other info? (For example infos about the expedition date, carrier, etc..)
What is the price indicated in the package for the customs?
Waiting for a feedback.
Thanks a lot!
Kinds
Sara
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Re: Order - How to find details
Kevin, I ordered mine at the end of last week, and just got an email the other day saying is shipped IndiaPost.? It is mentioned on there website that allow 3 or 4 weeks for shipping to the USA.? I just saw where some one posted they ordered Jan 3, and received Jan 25.? I am looking forward to getting mine, but taking this time to read the board more.? Good luck with yours and 73!
N3YUG Jason
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Posts not showing up in forum
Hello all, I have been reading a good amount in the BITX forum, and tried to reply with a few comments, but nothing shows up. SO I am going to try starting a new topic. Any ideas on what is going on?
Thanks and sorry to clutter the forum with this.
Jason N3YUG
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Hi all,
I want to buy a Bitx40.
I live in Italy and i have seen that the site offers a direct check-out button for PayPal.?
There are no other way to insert address for expedition or other datas.?
How do you manage the sales? Do you communicate a tracking number or other info? (For example infos about the expedition date, carrier, etc..)
What is the price indicated in the package for the customs?
Waiting for a feedback.
Thanks a lot!
Kinds
Sara
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Re: Idea for future versions of BITX
Hello Ashhar, ? The community seems to have already solved the problem: ? The prospect of a Linux architecture is very attractive for these types of builds! ---- Phil W1PJE
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Re: transmitting CW with Raduino Bitx40?
I am very interested in seeing where this goes on the CW side.? I would like to do both SSB and straight key cw on my unit some day.? Thanks for all you guys are doing!
N3YUG
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Re: BIt X 40 powers up no display
On Tue, Jan 10, 2017 at 08:55 pm, Chris Andrews wrote: ?Any ideas please what I am doing wrong ?I had the same problem. But since u found that when orange wire ?got ?pluged to power switch .....is working fine, (tnx for that) u found the solution by yourself. ? ? u can use ?the 2 poles of volume switch..... Put back the orange to the volume knob (as by the instructions) and solder a new wire ?(i used the spair part from ant wire) ?from the second pole of the volume switch to the power socket.......
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Buzz
I had uploaded some BPF plots earlier this week and announced it.
Look at
Files > VA3ABN .> Bitx40V3
73 Ken
On Wed, Jan 25, 2017 at 11:56 PM, VE7BEE <obeebe@...> wrote: Hey Ken , did your friend ever come up with the filter list for the different bands ? Buzz VE7BEE
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Raj vu2zap
Ion Petroianu, VA3NOI