Re: Recommendations for learning coding for Bitx and/or arduino
Be warned very addictive, got at least two of Jacks books and am well and truly hooked In only a couple of months.
Great people on this forum and very helpful.
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Re: [SPAM] Re: [BITX20] RD16HHF1 in the uBITX
#ubitx
Hi, I just unpacked my ¦Ìbitx to check what was supplied and no time yet to hook it up. Just a thought on the output power drop. Can you try simulating reducing C93 and C94 so that with the corresponding higher reactance at lower frequencies less drive will be available at lower frequencies. A value could be found to more or less even out the drive across the frequency range since the gate capacitance higher reactance at lower frequencies?will compensate for the increased capacitive reactance of C93 and C94 while on the higher frequencies the opposite will be true.
Regards Lawrence
On Mon, Feb 19, 2018 at 4:35 PM, K9HZ <bill@...> wrote: > I did find the following in my simulations though... if you change R85 from 100 to 470 ohms (pre-driver stage bias), change R261 and R262 from 100 to 1K ohm, run RV1 wide open (full drive) and then use a compensating capacitor (your 33pf at 14 MHz) across T11 primary with a 1:4 transformer: >? > 6M - 48pf > 10M - 110pf > 20M - 320pf > 40M - 680pf > 80M - 1,500pf > 160M - 4,700pf >? > It shows at least 20 watts out on each band except for 6 meters... where it peaks at 12 watts. >? >? ? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? ? email:? bill@... ? ? ? ?Dr. Schmidt -- no way to put some feedback into the circuit in some manner to stabilize the gain?? ? 1000 pf across the 22 ohm emitter resistors to have a 3db break at 7 MHz? ? ?
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Re: Videos for how to wire Ubitx
?Excellent job Neo.? Sometimes an explanation helps clarify things.? Especially for someone new to kit building, etc.? I love to see all the community work around this.? Everyone bringing their expertise to help out.?? Thanks again.
73, Michael
KM4OLT
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Re: Recommendations for learning coding for Bitx and/or arduino
Where can we get this book Jack?
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On Feb 19, 2018, at 3:16 AM, Paul Schumacher via Groups.Io < wnpauls@...> wrote: Yes!? Jack's book "Beginning C for Arduino "?is great!
Paul K0ZYV
From: Jack Purdum via Groups.Io <jjpurdum@...>
To: [email protected]
Sent: Sunday, February 18, 2018 9:52 PM
Subject: Re: [BITX20] Recommendations for learning coding for Bitx and/or arduino
Can I get someone else to say it for me...
Jack, W8TEE
From: Mike Lichtman via Groups.Io < tchrme@...> To: [email protected] Sent: Sunday, February 18, 2018 10:32 PM Subject: [BITX20] Recommendations for learning coding for Bitx and/or arduino Okay, I have played with boatanchors and know how to work on tube type radios. Time
to learn some coding for the BitX and/or Arduino. I have a Mac computer. Where should I?
start? Which books are best? I am open to all recommendations? 73 Mike KF6KXG
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Carl did a nice job. I lined mine with copper foil to reduce interference. Others may be in a better position to comment on whether it is necessary or not.
https://www.ebay.com/itm/Tapes-Master-2-x-10ft-Copper-Foil-Tape-EMI-Shielding-Conductive-Adhesive-2/282438503301?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Tim
WB7UVH
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On 2018-02-19 09:32, Carl Beck wrote:
I have updated my PDF File as a result of questions in assembling the uBITX in my Case.? After I post my PDF File on the forum: for a couple of days I get request fir the case and questions.? It seems the it falls off the radar until I post again.? I am getting good reviews from those who ordered my case so take a look: you may want one.
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Re: Recommendations for learning coding for Bitx and/or arduino
Jack's book is great!? Got it for my birthday last month.....:)
Tom
AB7WT
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Re: Contacts with completed BITX transceivers
I'd up for a test. I know my 40 meters works and I'm sure I can test at 30 as well. Email me to coordinate KC9RGE@...
On Feb 17, 2018 09:07, "Ken Brown" < n4so.ken@...> wrote: Anyone with a completed BITX radio?? QRV on the 30 meter band.?
?A 40 meter antenna is in the works.
No response from the first request. Anyone???
Ken N4SO
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Re: Maximum safe input voltage to ubitx?
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On Mon, Feb 19, 2018 at 8:40 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote: It says "No longer available"
Jack, W8TEE
From: VE7WQ <v@...>
To: [email protected]
Sent: Monday, February 19, 2018 1:52 AM
Subject: Re: [BITX20] Maximum safe input voltage to ubitx?
Better yet, a SEPIC (non-inverting) PM-6009DU Buck-Boost 4A converter:
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I have updated my PDF File as a result of questions in assembling the uBITX in my Case.? After I post my PDF File on the forum: for a couple of days I get request fir the case and questions.? It seems the it falls off the radar until I post again.? I am getting good reviews from those who ordered my case so take a look: you may want one.
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Re: Contacts with completed BITX transceivers
Ken, I'd sure be up for a sked. Either 30 or 40 in the mornings would be best. Probably 30 would have the best propagation. Email me a nd6t@.... 73, Don
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Re: Second batch of uBITX shipping?
#ubitx
For us Europeans, 'snail mail' seems to be the best way (and often fastest by not using DHL) as DHL seems to always incur customs inspection and charges etc.
Nigel - G4ZAL
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Re: Maximum safe input voltage to ubitx?
I have a few on hand already Jack. I will try that, hopefully they are not too noisy.
thanks,
Paul K0ZYV
From: Jack Purdum via Groups.Io <jjpurdum@...>
To: [email protected]
Sent: Monday, February 19, 2018 9:11 AM
Subject: Re: [BITX20] Maximum safe input voltage to ubitx?
It says "No longer available"
Jack, W8TEE
From: VE7WQ <v@...> To: [email protected] Sent: Monday, February 19, 2018 1:52 AM Subject: Re: [BITX20] Maximum safe input voltage to ubitx? Better yet, a SEPIC (non-inverting) PM-6009DU Buck-Boost 4A converter:
http://tinyurl.com/y9ysz6k5
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Re: Micron? long, logical and hopefully both educational and amusing ...
Here's my 2?, but maybe I'm ? crazy, or even crazy?. ?Come se dice en Espa?ol?? ?Ay caramba! Are you paying in $, €, ?, or ??? Is that knob ?25.4mm?? All hail the ?B?!? Or its little brother the B40?!? Which is better, a 40% discount, or 40¡ë?? All this fussing is like a ? or worse, ?, in my heart.? Maybe it's the weather; we haven't seen 70¡ãF for a while, three months ¡Àa few days anyway.
Typed using the codes from ?which are of the form?ALT+0xxx.
But ohm and pi you gotta copy and paste.
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Re: [SPAM] Re: [BITX20] RD16HHF1 in the uBITX
#ubitx
> I did find the following in my simulations though... if you change R85 from 100 to 470 ohms (pre-driver stage bias), change R261 and R262 from 100 to 1K ohm, run RV1 wide open (full drive) and then use a compensating capacitor (your 33pf at 14 MHz) across T11 primary with a 1:4 transformer: >? > 6M - 48pf > 10M - 110pf > 20M - 320pf > 40M - 680pf > 80M - 1,500pf > 160M - 4,700pf >? > It shows at least 20 watts out on each band except for 6 meters... where it peaks at 12 watts. >? >? ? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? ? email:? bill@... ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Gibby
Sent: Saturday, February 17, 2018 6:54 PM
To: [email protected]
Subject: Re: [BITX20] RD16HHF1 in the uBITX #ubitx? ?Dr. Schmidt -- no way to put some feedback into the circuit in some manner to stabilize the gain?? ? 1000 pf across the 22 ohm emitter resistors to have a 3db break at 7 MHz? ? ?
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Re: Would like to sell an unopened BITX40 kit
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Would like to sell an unopened BITX40 kit
I have an unopened BITX40 kit, just as it arrived at my home from India. I ordered it in November 2017, but since then I've decided I'd rather build a BITX20 if I do a single band unit, or build a uBITX to get 20 meters. Price is $40 USD + shipping in any manner you wish. I will be happy to package the unopened box in another box (double box) if you wish, before shipping.?Two-day priority USPS shipping in the U.S. is $13.65.?Prefer shipping in the U.S. only, otherwise it would be cheaper for you to simply order directly from HFSIGS in India. You can pay me with PayPal, or personal check. No offers, please.?Contact me directly at markvmuller at gmail dot com. I will leave a note here once it is sold. 73s de N5KNG.
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Re: Maximum safe input voltage to ubitx?
It says "No longer available"
Jack, W8TEE
From: VE7WQ <v@...>
To: [email protected]
Sent: Monday, February 19, 2018 1:52 AM
Subject: Re: [BITX20] Maximum safe input voltage to ubitx?
Better yet, a SEPIC (non-inverting) PM-6009DU Buck-Boost 4A converter:
http://tinyurl.com/y9ysz6k5
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Re: Recommendations for learning coding for Bitx and/or arduino
Alas, Simon's books are quite good...
Jack, W8TEE
From: Dennis Zabawa <kg4rul@...>
To: [email protected]
Sent: Monday, February 19, 2018 8:50 AM
Subject: Re: [BITX20] Recommendations for learning coding for Bitx and/or arduino
Take a look at these from Amazon:
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Re: HFsignals no longer selling just vfo
These are incredibly useful when experimenting (i.e., messing around) with the Nano. Get a handful of Dupont connectors and have at it!
Jack, W8TEE
From: LKNDAVE via Groups.Io <novatronix@...>
To: [email protected]
Sent: Monday, February 19, 2018 9:27 AM
Subject: Re: [BITX20] HFsignals no longer selling just vfo
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Michael Monteith
Carl Beck
Don, ND6T
Arvo W0VRA
K9HZ
_Dave_ AD0B