Re: uBITX shipping time
Hi my ubitx was posted via India mail on the 12th April and received today on the 14th just 2 working days and no customs charges brilliant now the fun begins.
By
a.vision
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#46398
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Re: TDA2822 fried
Mine has FCI and Pl1 then TDA2822M on it, have had it on RX for quite some
time.
Phil - G7BZD
wrote:
By
philip yates <phil@...>
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#46397
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Re: TDA2822 fried
WX is the marking.
Ideally cut the 12V track and feed 9V from a regulator. I use a 78L09 soldered on to the board as a hear sink.
You can use a 7809 or 7808 on the chassis and run a wire.
Raj
By
Raj vu2zap
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#46396
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Re: TDA2822 fried
Do we know what the markings are on the faulty IC's
Phil - G7BZD
By
philip yates <phil@...>
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#46395
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Re: TDA2822 fried
Nice PAUL,
Don't just increase volume much and don't immediately use ear /
headphones. *Many buyers, are perhaps not using the experiences of others.*
The do irrelevenat and then only relaise after
By
MVS Sarma
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#46394
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Re: #uBiTx CW RF power out
#ubitx
On Mon, Mar 5, 2018 at 07:46 pm, Jerry Gaffke wrote:
>
> Set bias for 100ma of drain current on each IRF510 using RV2 and RV3 and
> then leave it be.
> That 100ma shouldn't change much even if you
By
Alan -MM?WXT
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#46393
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Re: #uBiTx CW RF power out
#ubitx
I can agree. The vast amount of help received Seems to have got me sorted with rf at the dummy load. Just now to get it on air for a signal report.
--
MM ? WXT
GQRP - # 15057
By
Alan -MM?WXT
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#46392
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Re: VK4PLN's Radrino replacement boards
Thanks Nick. MUCH easier on the eyes¡
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
Owner
By
K9HZ
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#46391
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Re: VK4PLN's Radrino replacement boards
PDF Version
By
Nick VK4PP
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#46390
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Re: VK4PLN's Radrino replacement boards
Here we go folks:
73
By
Nick VK4PP
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#46389
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TDA2822 -- what's a vendor to do?
Hi
This is kind of an Ashhar question....
What's to become of all those fast-failing TDA2822 chips?
Has the vendor offered any compensation?? The main reason I'm asking is -- I've been in a number
By
Jim Strohm
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#46388
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update to KD8CEC 1.061 firmware user manual
Hi All,
attached is an updated user manual for the KD8CEC 1.061 firmware.
The updates were to
1. incorporate feedback received on the manual, with some new
??? operating tips,and
2. enhance the
By
Rod Davis <km6sn@...>
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#46387
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Re: AGC circuit to try?
Lawrence,
So happens I'have all the mobile manuals and the SSB for radio amateurs since they were printed...
Yes its a good circuit, low noise and wide agc range.? HyCas is a variation of that as
By
ajparent1/kb1gmx
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#46386
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Re: ubitx keyer
The Greater Cincinnati Builders Group is actually doing our Pixie build on the 21st. I'll let the group know how it goes.
Jack, W8TEE
By
Jack Purdum <jjpurdum@...>
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#46385
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Re: ubitx keyer
I also agree that the Pixie is less than a CPO.? We have done this a couple times at schools
we work with.? It's a lot of fun. Garry, AK4NA, is arranging 10 Pixies for the school he supports
for
By
Jim Stafford W4QO
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#46384
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Re: TDA2822 fried
Just got my package? and so glad that the chip now has a socket
By
Paul N2QXB <n2qxb@...>
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#46383
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Re: AGC circuit to try?
Part 3
By
Lawrence Galea
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#46382
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Re: AGC circuit to try?
Part 2
By
Lawrence Galea
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#46381
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Re: AGC circuit to try?
Ge evening Allison.
I mentioned it because of the two fets used in cascade at the front end and
the use of agc.
It's design being nearly 50 years old is a totally different concept.
As you said the
By
Lawrence Galea
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#46380
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Re: [qrp-tech] DC-DC converter experiment
It might be the DDS/VFO board we did for the QST article (March, 2015) on the Forty-9er. The only touchy thing about the buck converter was the Phillips head screw that adjusts the voltage which was
By
Jack Purdum <jjpurdum@...>
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#46379
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