Re: Ubitx5 ?
Is that the uBitx v5? -- 72 and God bless KD4EPG
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Dennis Yancey
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#61235
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Re: PSK31 ghosts below my signal
I think you meant Hz not KHz. That's easy to check. Put the radio into transmit but do not feed it any audio at all. Do you still see the signal? If so that's the carrier. If it only appears with a
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Diane Bruce
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#61234
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Re: K5BCQ agc
Sorry, I should have also included the place where the receive path is tapped on the BITX40. It is on a separate page here ( http://www.nd6t.com/bitx/Another%20RF gain control ).
By
Don, ND6T
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#61233
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Re: K5BCQ agc
Yes, it works just as well on the BITX40. Instructions can be found on ND6T.com here ( http://www.nd6t.com/uBITX/AGCkit ).
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Don, ND6T
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#61231
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Re: PSK31 ghosts below my signal
Paranormal signal is about eyeballing 1400khz (I think??) below. Receiving websdr is miles away.? If I reduce drive the ghost appears proportionally reduced. ? ?I was told by a club member that my
By
Don - KM4UDX
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#61230
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Re: PSK31 ghosts below my signal
This sounds more like opposite side band is not being suppressed properly, but hard to tell without more information. If it's a filter problem the signal will be inverted.
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Diane Bruce
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#61229
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Re: PSK31 ghosts below my signal
On 80M the relays make a big difference to spurs. The ghost will be around -35db at the worst.. not stronger than that. Reduce the drive and see what happens. Raj
By
Raj vu2zap
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#61228
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Re: Harmonics and Relay Replacement
I was having few NLT25T-R68J-PF made by TDK, as I bought from comkey.com , a Bangaluru based seller of India. as Per spec they are 5% tol. and shielded. wrote:
By
MVS Sarma
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#61227
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Re: Harmonics and Relay Replacement
You are right Jerry! I goofed on this 330uH !
By
Raj vu2zap
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#61226
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Re: Harmonics and Relay Replacement
Gene, Change the relays for sure. 3 axicom will do for KT1,2,3 With relay change the spurs decrease with lower 3rd 5th harmonics. You can change L5/7... they are same as original values or close to.
By
Raj vu2zap
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#61225
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PSK31 ghosts below my signal
Hello!? I installed a sound card, checked drive levels, and monitored my psk31 via a online sdr that could hear me. I was thrilled to see my signal...I was getting out!? I was also sending a mirror
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Don - KM4UDX
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#61224
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Re: QSX 10W HF Linear PA kit
I am thinking of putting a dummy load on the unused portion of the heat sink. Mount a switch to select antenna or dummy load. -- Mike AI4NS
By
Mike Short <ai4ns.mike@...>
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#61223
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Re: Cursed?
My recent ubitx arrived with lsb bfo way off. Possibly these boards are okay, don't rule out something simple. Do note eith no agc, when signals are weak one must crank up the audio gain. Curt
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Curt
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#61222
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Re: my uBitx Power
Ok got it.
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Joe Puma <kd2nfc@...>
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#61221
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Re: Ubitx with 4 nos of IRF510 in the final
This was done some years back by a Japanese ham on an amp using RD16HH mosfets.** . I have limited documentation on this matter.? His modication was to put? approx 8T ECW (you choose dia )? on a
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Timothy Fidler <engstr@...>
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#61220
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Ubitx with 4 nos of IRF510 in the final
Dear friends, Can I use two IRF in parallel in UBITX to increase output power? So total 4 IRF in the final? 73ees John T.P., VU2JON TTRRA 80, 6th lane, TT Road, Kuriachira PO Thrissur 680 006 Kerala
By
John T P
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#61218
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Re: Harmonics and Relay Replacement
Gene, Here's a post from the old thread on the spur fix: ? ??/g/BITX20/message/60678 The entire thread is worth browsng. Raj found that replacing the toroids at L5 and L7 with 1210
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Jerry Gaffke
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#61217
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wanted: ND6T AGC kit
If anyone has an ND6T AGC kit they would like to sell, please contact me. Darryl K0GV
By
Darryl Ponder
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#61216
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Re: Harmonics and Relay Replacement
HI Raj, Thanks for the info, I have the relays on order. Should I also change L5/7 at the same time? (Exactly what is the L5/7 Change?, Is it a value change or just convert to SMT?) Gene N2IJF
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Gene Nitschke <genenitschke@...>
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#61215
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Re: my uBitx Power
Okay on SSB without talking that was .80a I forgot to mention that my measurements was taking while pressing the CW key. Joe
By
Joe Puma <kd2nfc@...>
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#61214
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