Re: Diy oscilloscope
#parts
JYE sells it with all surface mount parts installed, you still have to add the through hole parts.
Here's what might be a good RF probe, suitable for low level signals, use it with a dvm:
?
By
Jerry Gaffke
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#41279
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Re: IRF510 more Volts = more W?
#ubitx
If you access the list from /g/BITX20/topics instead of an email client you will have access to the search function.? Searching for *irf510 24v* will yield enough reading to keep you
By
Doug W
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#41278
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Re: Diy oscilloscope
#parts
I would like to get on of these and a real one not a knockoff but I’m trying to find one build already. I’m not afraid to build the kit but I’d rather get it built at the moment.
I’m also
By
Joe Puma <kd2nfc@...>
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#41277
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Re: At long last!!
Sorry about that. My order date was December 16, 2017. Hope the rest of you
that are waiting I hope you get your radio soon
73
Dave KD1NA
--
Dave Robertson KD1NA
By
David Robertson <kd1na363@...>
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#41276
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IRF510 more Volts = more W?
#ubitx
I could not find the answer on the forum but I apologize now if it has already been answered.?Noting the need for an improved heatsink/s.?Has anyone done any experiments with increasing the PA
By
Jim McKay
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#41275
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Re: LTSpice simulation of uBitx Power Amp
Looking at the schematic, has anyone tried changing the turns ratio on T10,
or monkeying with the preamp? It would lower the drive level, but also
lower the drive impedance. One might also increase
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Diver Martin <diver.martin@...>
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#41274
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BITX40 Low audio volume with 8.5V to board/Raduino
Hi gang.? So I thought I'd get stupid and add complexity where none is needed.? Radio: BTX40, 1.27.7 'ware, basic hardware mods.? I put a buck converter between the power switch and the leads that
By
Steve
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#41273
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Re: LTSpice simulation of uBitx Power Amp
I suppose.
The LTSpice model of the IRF510 does assume worst case, perhaps that is part of it.
But the WA2EBY model is off from the performance reported in the QST article by more than I would expect
By
Jerry Gaffke
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#41272
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Re: LTSpice simulation of uBitx Power Amp
Mod ls are Starting points without spending $.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner –
By
K9HZ
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#41271
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Re: LTSpice simulation of uBitx Power Amp
the output to be so much lower at 30mhz
To quote George E.P. Box, "All models are wrong, but some are useful."
Spice models are just that, models. They're rarely right. But they can
tell you
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Diver Martin <diver.martin@...>
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#41270
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Re: LTSpice simulation of uBitx Power Amp
Have now uploaded version two of the simulation:
? ?/g/BITX20/files/KE7ER/WA2EBYandUBITX_2.asc
? ??/g/BITX20/files/KE7ER/WA2EBYandUBITX_2.pdf
Has the following
By
Jerry Gaffke
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#41269
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Re: whistles in receive
And to think I have 1 old ICOM I'm to poor for any else lol
[email protected]> wrote:
By
chris gress <Chrisg0wfh@...>
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#41268
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Re: whistles in receive
One can get carried away, however...
Jack, W8TEE
To: [email protected]
Sent: Monday, February 5, 2018 10:49 AM
Subject: Re: [BITX20] whistles in receive
There have been numerous articles in
By
Jack Purdum <jjpurdum@...>
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#41267
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Re: Second batch of uBITX shipping?
#ubitx
Just got email about 6 hours ago with the tracking number.
I ordered on December 17. I am in USA.
Estimated delivery date from DHL website using the tracking number is Friday February 9.
--
KK6VLV
By
KK6VLV
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#41266
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Re: At long last!!
Mine was December 20, 2017.
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This email has been checked for viruses by AVG.
http://www.avg.com
By
Leland Lannoye
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#41265
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Re: At long last!!
Great news Dave.. got mine last week and it’s built in a case and firmware updated..
Good seeing you at BBQCon a few weeks ago.
73 Bill Ng1p
By
bill richardson
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#41264
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Re: At long last!!
DSL? Coming via internet connection? :)
Do you recall your order date?
Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
By
Vince Vielhaber <vev@...>
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#41263
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At long last!!
I finally got my paypal e-mail indicating my uBITX radio is shipping. As for many others it has been a long wait. Looking forward for the DSL package at my door
73
Dave KD1NA
By
David Robertson <kd1na363@...>
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#41262
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Re: whistles in receive
One of my earliest memories at about 3 years of age, maybe less, is being fascinated
by the console tube radio we had in the living room.
Peering around in back, face pressed against the wall, trying
By
Jerry Gaffke
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#41261
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Re: Second batch of uBITX shipping?
#ubitx
Klinkt mir, dass der Herr Walter Ulbricht beherrscht die deutsche Kontrolle jetzt! . Jawohl, Komrad!
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By
Leland Lannoye
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#41260
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