Re: ubitx ver. 3 for sale
hi
i am hoping to pay a bit less than that
probably one without a box as i already have a box.
my alternative is to wait until the qsx becomes available at $75 for the mono band version.
or to buy a kit from india
73 terry gm4dso
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Re: Ideas for homebrew rig for digital modes on VHF/UHF
I didnt want to come right out and say that to discourage the poor lad, bit of course you are correct. FM only above 29MHz. And at the bottom of the propagation cycle that pretty much eliminates it as useful for anything more than local chats.
However it does make an interesting theoretical exercise to add it to the radio. Receive is easy. Transmit a bit more difficult.
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On Dec 30, 2018, at 10:45 AM, Bill Cromwell <wrcromwell@...> wrote:
Hi,
In the US FM is allowed (and used) on 10 meters above 29 MHz.
To use a transmitting or receiving converter with FM and an HF radio(s) the HF radios must do the FM. It's not particularly expensive and not beyond the reach of home brew hams.
73,
Bill KU8H
On 12/30/18 7:47 AM, MadRadioModder wrote:
FM on the uBITx. Interesting. Not a very popular mode on HF but a good exercise in design anyway. Ill draw something up as a theoretical challenge.
On Dec 30, 2018, at 8:33 AM, Bill Cromwell <wrcromwell@...> wrote:
Hi,
That won't give the OP the FM mode. But in the Olde Days, prior to 2017, there were many mods publish to add modes to receivers that didn't have them. Mods like a BFO. Mods for a product detector for SSB and improved CW. And lets not forget an FM strip that can be added to the I.F. strip in a receiver. Yes Virginia, there were communication receivers built without BFOs, without product detectors, without FM. What was olde is new again:)
Has anybody done an FM detector for the uBitx or Bitx40? This mail list is for the uBitx and Bitx40 but there ARE other options including the use of transceiving converters. Transverters are transmit additions. At one time transmitters and receivers lived in separate boxes. Some still do. You will want a converter for receive too. Those change the band of operation. Other mods give new modes such as FM such as an FM strip added to a bitx machine. The transmit side will have to be "FMed" too. Not impossible.
73,
Bill KU8H
On 12/30/18 7:12 AM, MadRadioModder wrote:
Ergo, buy a TenTec transverter... or copy one and you are done!
--
bark less - wag more
--
bark less - wag more
--
¡_. _._
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Re: ubitx ver. 3 for sale
hi brian
i heard that if you use royal mail then you do not pay customs etc but if you use the carrier then you do.
also if you are buying from a private person then they should declare it as a gift and "no resale value" commercial vendors cannot do that
correct me if i am wrong
terry gm4dso
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Re: ubitx ver. 3 for sale
Hello Terry
My uBitx V3 bought everything mounted. I finish putting in a box. This rig has not received any changes from the group .io/uBibx.
It is therefore a factory version. I still have to plug the microphone jack and put a coaxial cable to the antenna plug instead of the two-conductor cable supplied factory. I have never used it in broadcast. The box is a box bought from Sunnil ()
I attach the electret capsule provided to make a microphone. I send to this the kits of K5BCQ AGC and Anticlicks. I think 180 euros plus 20 euros for shipping.?Paypal payment preferably. Transport by Mondial Relay.
73 QRO F1BFU /Fr Zone contenant les pi¨¨ces jointes
Le?dim. 30 d¨¦c. 2018 ¨¤?15:02, terry hughes via Groups.Io <terryhugheskirkcudbright= [email protected]> a ¨¦crit?:
hi
is it still available and can you ship to uk at what cost
terry gm4dso
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Re: ubitx ver. 3 for sale
Hi Terry,
The problem you have here is if you buy from the US, you stand a fair chance of being whacked for import tax and then vat on the total including the transport cost.
?I bought a Bitx case from India and it cost me a fortune in vat and duty almost doubling the cost. Anything under ?15 is free of duty.
de Brian (G3YYT)
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Re: new unbuilt for sale
#ubitx
Hi,
I don't see the original post but probably the offer includes more than just the original kit. Maybe a cabinet and/or some of the "upgrade" kits like AGC or touch screen display. All of those co$t. If it is too expensive for you then you should order the kit for $129. Those 'enhancements' have no value to me so I ordered the kit and I have been using it happily with only a software upgrade and a home brew mod to tame the wild sidetone.
Happy New Year and 73,
Bill KU8H
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On 12/30/18 9:05 AM, terry hughes via Groups.Io wrote: hi
why is the price more than the $129 of the kit from india
terry gm4dso
--
bark less - wag more
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Re: Ideas for homebrew rig for digital modes on VHF/UHF
Hi,
In the US FM is allowed (and used) on 10 meters above 29 MHz.
To use a transmitting or receiving converter with FM and an HF radio(s) the HF radios must do the FM. It's not particularly expensive and not beyond the reach of home brew hams.
73,
Bill KU8H
toggle quoted message
Show quoted text
On 12/30/18 7:47 AM, MadRadioModder wrote: FM on the uBITx. Interesting. Not a very popular mode on HF but a good exercise in design anyway. Ill draw something up as a theoretical challenge.
On Dec 30, 2018, at 8:33 AM, Bill Cromwell <wrcromwell@...> wrote:
Hi,
That won't give the OP the FM mode. But in the Olde Days, prior to 2017, there were many mods publish to add modes to receivers that didn't have them. Mods like a BFO. Mods for a product detector for SSB and improved CW. And lets not forget an FM strip that can be added to the I.F. strip in a receiver. Yes Virginia, there were communication receivers built without BFOs, without product detectors, without FM. What was olde is new again:)
Has anybody done an FM detector for the uBitx or Bitx40? This mail list is for the uBitx and Bitx40 but there ARE other options including the use of transceiving converters. Transverters are transmit additions. At one time transmitters and receivers lived in separate boxes. Some still do. You will want a converter for receive too. Those change the band of operation. Other mods give new modes such as FM such as an FM strip added to a bitx machine. The transmit side will have to be "FMed" too. Not impossible.
73,
Bill KU8H
On 12/30/18 7:12 AM, MadRadioModder wrote:
Ergo, buy a TenTec transverter... or copy one and you are done!
--
bark less - wag more
--
bark less - wag more
|
Out of curiosity, what is the stock number from this source? I've been looking at that option as well. Thanks.
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Advantages and disadvantages of various modes on vhf/uhf
Keep in mind that SSB and CW have a 6dB advantage over all other modes.? They are highly preferred for satellite and moonbounce contacts, and often can be used for relatively local contacts, as well as during band openings.? These are considered as minimal bandwidth requirements and high sensitivity.? The newer digital modes, such as FT8, take advantage of this to make successful contacts in marginal conditions.? I have also used PSK-31 for a two-way contact from Tucson, AZ to Prescott, AZ (200 miles) on 2M ssb on a Diamond dual-band antenna up 50 feet.? Our 2M SWOT net on Sunday morning regularly logs contacts between Tucson and Prescott, as well as to several locations in NM.
FM has the advantage of less noise when active and can be used on repeaters.? We ran a successful EMCOM net using Olivia 8-1000 on a local multi-site repeater system.? For EMCOM work, it is essential, since you have the advantage of formal messages with structured content.? And of course the repeaters themselves are the biggest advantage of FM.
--
Ron W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320
Editor OVARC newsletter
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Re: Harmonics and Relay Replacement
Al,
Any version should work in this case. The power difference might make a difference in the time in milliseconds that
the relay might close. That to me is important when doing QSk.
The relay architecture is what is important. Low inductance IMHO.
Raj
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At 30-12-18, you wrote: Please excuse my incomplete question re advice.
I was asking for advice on my original post of Nov.2:
"I'd appreciate advise on whether the 5303 should work, or whether it was a typo, since it's what I ordered. The 5303 has a coil power of 200mw, vs. 400mw for the 5403. See attached data sheet for other factors."
... which asked the same question as MVS Sharma on Oct.16: "I suppose that the prescribed relay was 23105 5403 A201. i see that your relay has 5303 instead. was it a typo? regards sarma vu3zmv
By MVS Sarma ¡¤ #60759 ¡¤ Oct 16"
Neither question elicited responses, so perhaps no one has an opinion. I haven't installed the 5303 yet.
--
73, Al - va3iaw
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Re: new unbuilt for sale
#ubitx
hi
why is the price more than the $129 of the kit from india
terry gm4dso
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Re: Harmonics and Relay Replacement
Please excuse my incomplete question re advice.
?
I was asking for advice on my original post of Nov.2:??
"I'd appreciate advise on whether the 5303 should work, or whether it was a typo, since it's what I ordered.? The 5303 has a coil power of 200mw, vs. 400mw for the 5403.? See attached data sheet for other factors."
?
... which asked the same question as MVS Sharma on Oct.16:? "I suppose that the prescribed relay was 23105 5403 A201. i see that your relay has 5303 instead. was it a typo? regards sarma vu3zmv
By MVS Sarma ¡¤ #60759 ¡¤ Oct 16"
Neither question elicited responses, so perhaps no one has an opinion.? I haven't installed the 5303 yet.??
-- 73, Al - va3iaw
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Re: ubitx ver. 3 for sale
hi
is it still available and can you ship to uk at what cost
terry gm4dso
|
I wanted to see if adding a RF amp to my V4 ubitx would improve reception and see if there were any downsides. I bought the Wideband Amplifier kit from KitsandParts to make this simple. I added the rf amp in the receive path before the mixer. I'm pleased with the increased sensitivity, intermod from other ham stations does not seem to be a problem, and the only issue was some intermod from some local 50KW broadcast stations. Adding a BCI filter in front of the amp solved that problem. My antenna is a end fed long wire for 40-10m. My next step is to add agc to this amp.
Harvey, WA2AAE
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Re: Ideas for homebrew rig for digital modes on VHF/UHF
Thank you for the replies.
I understand that the current digital modes are used on either FM or SSB but I assumed this was largely because that's what most hams had available. Similar to how we ended up with 56k as the fastest modem for dial up because of the limitations of the existing phone system.
I suppose my real question at the moment is what are the advantages and disadvantages of FM vs SSB (or any other form of modulation such as AM or Phase Modulation) for digital work on VHF/UHF?
Perhaps there are no practical difference but I feel this is a good place for me to start my research.
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Re: Ideas for homebrew rig for digital modes on VHF/UHF
FM on the uBITx. Interesting. Not a very popular mode on HF but a good exercise in design anyway. Ill draw something up as a theoretical challenge.
toggle quoted message
Show quoted text
On Dec 30, 2018, at 8:33 AM, Bill Cromwell <wrcromwell@...> wrote:
Hi,
That won't give the OP the FM mode. But in the Olde Days, prior to 2017, there were many mods publish to add modes to receivers that didn't have them. Mods like a BFO. Mods for a product detector for SSB and improved CW. And lets not forget an FM strip that can be added to the I.F. strip in a receiver. Yes Virginia, there were communication receivers built without BFOs, without product detectors, without FM. What was olde is new again:)
Has anybody done an FM detector for the uBitx or Bitx40? This mail list is for the uBitx and Bitx40 but there ARE other options including the use of transceiving converters. Transverters are transmit additions. At one time transmitters and receivers lived in separate boxes. Some still do. You will want a converter for receive too. Those change the band of operation. Other mods give new modes such as FM such as an FM strip added to a bitx machine. The transmit side will have to be "FMed" too. Not impossible.
73,
Bill KU8H
On 12/30/18 7:12 AM, MadRadioModder wrote:
Ergo, buy a TenTec transverter... or copy one and you are done!
--
bark less - wag more
--
¡_. _._
|
Re: Ideas for homebrew rig for digital modes on VHF/UHF
Hi,
That won't give the OP the FM mode. But in the Olde Days, prior to 2017, there were many mods publish to add modes to receivers that didn't have them. Mods like a BFO. Mods for a product detector for SSB and improved CW. And lets not forget an FM strip that can be added to the I.F. strip in a receiver. Yes Virginia, there were communication receivers built without BFOs, without product detectors, without FM. What was olde is new again:)
Has anybody done an FM detector for the uBitx or Bitx40? This mail list is for the uBitx and Bitx40 but there ARE other options including the use of transceiving converters. Transverters are transmit additions. At one time transmitters and receivers lived in separate boxes. Some still do. You will want a converter for receive too. Those change the band of operation. Other mods give new modes such as FM such as an FM strip added to a bitx machine. The transmit side will have to be "FMed" too. Not impossible.
73,
Bill KU8H
toggle quoted message
Show quoted text
On 12/30/18 7:12 AM, MadRadioModder wrote: Ergo, buy a TenTec transverter... or copy one and you are done!
--
bark less - wag more
|
Re: Ideas for homebrew rig for digital modes on VHF/UHF
Ergo, buy a TenTec transverter... or copy one and you are done!
toggle quoted message
Show quoted text
On Dec 30, 2018, at 5:17 AM, iz oos < and2oosiz2@...> wrote: There is not something else. There are digital modes that are transmitted in FM (dmr, c4fm, dstar, aprs, winlink stuff) and others in SSB (CW, wj, fsk, ft8). In my humble opinion it would be very difficult to implement all these at a reasonable price. I would be interested in a V-U version of the Bitx, that is SSB-CW. A practical solution is to simply add transverters. Some are very cheap on ebay. There are few things to be addressed. First remove spurs on SSB at 28mhz if the transverter does not have a bandpass input filter (TenTec transverter have it) . That can be done with the solution suggested by Farhan. In my opinion the transverters should rely not only to PTT but to the RF sense too in order to be sure you don't fry the transverters. 2m TenTec transverters work FB and have just the RF sense TXRX changeover.
--
¡_. _._
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Re: S-Meter in KD8CEC v 1.1 with Nextion 2.8 does not work
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Re: Ideas for homebrew rig for digital modes on VHF/UHF
There is not something else. There are digital modes that are transmitted in FM (dmr, c4fm, dstar, aprs, winlink stuff) and others in SSB (CW, wj, fsk, ft8). In my humble opinion it would be very difficult to implement all these at a reasonable price. I would be interested in a V-U version of the Bitx, that is SSB-CW. A practical solution is to simply add transverters. Some are very cheap on ebay. There are few things to be addressed. First remove spurs on SSB at 28mhz if the transverter does not have a bandpass input filter (TenTec transverter have it) . That can be done with the solution suggested by Farhan. In my opinion the transverters should rely not only to PTT but to the RF sense too in order to be sure you don't fry the transverters. 2m TenTec transverters work FB and have just the RF sense TXRX changeover.
Il 30/dic/2018 08:49, "FC" < felixc64+groups.io@...> ha scritto: Hello,
I'd like to experiment with digital modes on VHF/UHF and don't want any potential limitation from commercial transceivers that may be available to me.
I have many questions on the topic, but to begin, if I wanted a purpose built rig for digital modes in these bands should I be looking at SSB, FM, or something else?
I also welcome suggestions of other groups or forums where I may be able to find information about this.
Thanks
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MadRadioModder
Ted
Raj vu2zap