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First HF Radio?
Jim, You will like sbitx if you are comfortable with software updates et al. If you are relatively new to electronics and software, it would be best to buy a used 100 watt japanese or elecraft radio.? - f On Tue, Jun 27, 2023, 10:13 PM Jim <winickyj@...> wrote: I am a ham that so far has only used vhf/uhf.? I have my general and am interested in diving into HF and find the sBitx_V2 interesting.? I am interested whether forum members would think that the Radio is stable enough to be suitable for a first/only HF radio? #sBitx_V2 |
开云体育I'd say yes, the reports are good and the design is stable. I had a "developer's edition" of the SBITX and enjoyed it, but there were updates/upgrades that the radio might benefit from that I chose not to implement. I soon sold the radio to a fellow ham that was comfortable to perform the updates/upgrades and he's (presumably) been happy.Bottom line, the design is mature, it has been tested by hundreds of hams, and I think it would make a great starter radio. Because of everything 'built-in (for example FT-8)' there may be a different learning curve compared to a traditional "Entry Level" HF radio like an IC-718, but the SBITX is certainly no harder to learn/operate. Ken, N2VIP? On Jun 27, 2023, at 11:43, Jim <winickyj@...> wrote:
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I think the hardware design is now sufficiently stable. The software is still a work in progress, so you have to have some tolerance for issues there if you're going to use it as your first HF radio. If you're the kind of computer user who happily runs beta software and updates often, it might be a good choice for you right now. The most direct competition is the Xiegu G90, and the contrasts between them are interesting. The G90 software is in a more complete state now. But its software lacks polish, and based on Xiegu's?track record it will probably never get it; they release products that are barely usable, work on the software until it's good enough, then move on to the next thing. The sBitx software is open source, and I expect that it will eventually be very very good; we're just not there yet. If your budget for an HF radio is in the US$400-500 range and you just want something that works right now without any fuss, I wouldn't recommend either of those. I'd say to check the used market for an Icom, Kenwood, or Yaesu that fits your budget. But watch out for eBay because prices there are often inflated; check with your local radio club to see if anybody has a suitable radio for sale, or visit a hamfest. On Tue, Jun 27, 2023 at 12:43?PM Jim <winickyj@...> wrote: I am a ham that so far has only used vhf/uhf.? I have my general and am interested in diving into HF and find the sBitx_V2 interesting.? I am interested whether forum members would think that the Radio is stable enough to be suitable for a first/only HF radio? #sBitx_V2 |
Jack, W8TEE
Jim: It would be helpful if you could answer these questions: ??? 1. What mode(s) do you expect to use most (e.g., SSB, CW, digital)? ??? 2. What power level to you want to use (e.g., QRP, 100W, or more)? ??? 3. Will it be an "at home rig" only, or will you also want to do SOTA, POTA, and other off-site activations. ??? 4. What kind of antenna would you like to deploy. ??? 5. What's your budget? (Disregard if you're not married.) Jack, W8TEE
On Tuesday, June 27, 2023 at 12:43:01 PM EDT, Jim <winickyj@...> wrote:
I am a ham that so far has only used vhf/uhf.? I have my general and am interested in diving into HF and find the sBitx_V2 interesting.? I am interested whether forum members would think that the Radio is stable enough to be suitable for a first/only HF radio? #sBitx_V2
-- Jack, W8TEE |
开云体育I agree with Sunil,look for a used 100W transceiver as your first transceiver unless you are an experienced kit builder or have much experience regarding electronics. If so, it is a very nice transceiver.? Vy 73 de Rolf, DL8BAG? Am 27.06.2023 um 19:43 schrieb Jack, W8TEE via groups.io <jjpurdum@...>:
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It would be helpful if you could answer these questions:
??? 1. What mode(s) do you expect to use most (e.g., SSB, CW, digital)?
? ? ? ? ?Just starting in HF so voice,? I am interested in using digital modes and Maybe CW eventuall ??? 2. What power level to you want to use (e.g., QRP, 100W, or more)?
? ? ? ? ?No sure how much I need,? Not wanting to be limited to QRP but figure if I need nore in future I could get amp.? looking for all around starter rig. ??? 3. Will it be an "at home rig" only, or will you also want to do SOTA, POTA, and other off-site activations.
? ? ? ? ?Primarily at home for now,? but may want to do a field day at some point ??? 4. What kind of antenna would you like to deploy.
? ? ? ? ?Don't know something relatively simple to start like a DX Commander.? I have some roof spaceand some suburban yard space. ??? 5. What's your budget? (Disregard if you're not married.) ? ? ? ? ?I was thinking of a 7300 as a starter? radio |
Jack, W8TEE
The IC-7300 is a very good radio and a wise choice as they are not too expensive for what you get. Gigaparts has them new for about $1100 and you can find them used for around $900. The fact they hold their resale value is a good sign of their worth! Jack, W8TEE
On Wednesday, June 28, 2023 at 12:54:35 PM EDT, Jim <winickyj@...> wrote:
It would be helpful if you could answer these questions:
??? 1. What mode(s) do you expect to use most (e.g., SSB, CW, digital)?
? ? ? ? ?Just starting in HF so voice,? I am interested in using digital modes and Maybe CW eventuall ??? 2. What power level to you want to use (e.g., QRP, 100W, or more)?
? ? ? ? ?No sure how much I need,? Not wanting to be limited to QRP but figure if I need nore in future I could get amp.? looking for all around starter rig. ??? 3. Will it be an "at home rig" only, or will you also want to do SOTA, POTA, and other off-site activations.
? ? ? ? ?Primarily at home for now,? but may want to do a field day at some point ??? 4. What kind of antenna would you like to deploy.
? ? ? ? ?Don't know something relatively simple to start like a DX Commander.? I have some roof spaceand some suburban yard space. ??? 5. What's your budget? (Disregard if you're not married.)
? ? ? ? ?I was thinking of a 7300 as a starter? radio -- Jack, W8TEE |
Hello! Like other fellow hams had pointed on their answers, you can go for an used 100w comercial transceiver, or get the sBitx and stick to the instructions if you get the kit, or order a fully assembled one. When you start on HF is better to start with some power (100w) in order to avoid frustration. QRP requires a lot of patience and faith… sometimes propagation is the worst possible and you won’t be able to make any contact… 73’s W5EGM On Wed, Jun 28, 2023 at 11:54 AM Jim <winickyj@...> wrote:
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Jack, W8TEE
Very true, Eduardo. Most rigs, including the 7300, allow you adjust the power so you can work QRP levels if you wish. Jack, W8TEE
On Wednesday, June 28, 2023 at 03:16:51 PM EDT, W5EGM <co6egm@...> wrote:
Hello! Like other fellow hams had pointed on their answers, you can go for an used 100w comercial transceiver, or get the sBitx and stick to the instructions if you get the kit, or order a fully assembled one. When you start on HF is better to start with some power (100w) in order to avoid frustration. QRP requires a lot of patience and faith… sometimes propagation is the worst possible and you won’t be able to make any contact… 73’s W5EGM On Wed, Jun 28, 2023 at 11:54 AM Jim <winickyj@...> wrote:
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Jack, W8TEE |
开云体育Jim, I 2nd Jack's reply.? I notice you said something about maybe doing a Field Day. The IC-7300 would be a great Field Day radio, if you are the only transmitter at the site. Otherwise, in multi-multi Field Days, our experience is that trying to use an IC-7300 is an exercise in frustration, because the direct-sampling receiver fronted in the IC-7300 is easily overloaded by nearby transmitters.? We even tried an IC-7610 this year at the GOTA station, and ended up subbing in my 'spare' Elecraft K3S, which preformed admirably. If you hang out on the Elecraft mailing lists, you will find from time to time someone who is selling their K3 or K3S, because they recently upgraded to a K4 or K4D.? Depending on what options are installed, the resale price will vary considerably, but a stripped down? used 100W K3 with one or two roofing filters might go for about what you are thinking of.? An original 100W K3 with one roofing filter used to sell for $1950 new about fourteen years ago.? Elecraft gear keeps their resale value. We also found out that not all direct-sampling receivers are alike, since my Elecraft K4D performed well.? The only noticeable issue was the Yaesu FTdx101d, when used on FT8 on 20M put out some composite phase noise that I was able to pick up on the K4D which was on 20M CW at the time.? It was enough to be noticeable on the waterfall display, but since we were running CW with a 400 Hz bandwidth, the additional noise was not really noticeable.? This was using multiband dipoles oriented end-to-end for minimal coupling for each station, and about 200 hundred feet apart.? All stations at our 4A with GOTA site were running 100W, and all the remaining stations were K3's with upgraded LO boards or K3S's.? Never heard a peep out of the other stations, unless you got within 15-20 kHz of each other.? We were using contest filters on all the stations, but they don't help at all with in-band issues, since they all cover a complete band, not just a portion of a given band. 73, -- Dave, N8SBE On 2023-06-28 15:16, Jack, W8TEE via groups.io wrote:
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In my limited experience, the IC-7300 also works well at a small multi-transmitter station that uses external bandpass filters and that only puts one signal on each band. If you're in 2A or 3A that's generally not a problem. Where it fails is when you try to have two or three transmitters on the same band at the same time (CW, SSB, and/or digital), which you'll probably be doing once you get above three transmitters. (Especially during the low part of the sunspot cycle, which is not where we are now.) The IC-7610 has a similar front end design, so it's likely to have the same problem. But I have no personal experience with it in that regard. The Field Day station I was at this year (W1BOS, 3A) did put transmitters on 75 and 80 meters in the middle of the night. We had separate antennas for those, at right angles to minimize interaction. (A low 80 meter dipole isn't all that directional so we weren't very concerned about which direction they were pointing, and on those bands you're going to largely be working NVIS paths anyway.) We used a K3 and something in the Flex 6000 series (I never operated it so I didn't catch which model it was) and they were quite happy. (Both radios had bandpass filters, but those did nothing to same-band signals.) We did NOT attempt to use our IC-7610 for that, based on reports from others. On Fri, Jun 30, 2023 at 11:07?AM Dave New, N8SBE <n8sbe@...> wrote:
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We ahve run 4A for decades using many radios.? While the K3/K3S are great?
we have had a mix of IC7300 and IC7610s? without resorting to band pass fitlers. (3 of the 4 are CW, phone, data,) we also run a GOTA usually with IC7610. IT works and no issues IF: No one over drives the radios (all!) and we spread the antennas over a 600Ft area.? When we did have two stations withing one antenna length the usual problem was gross RX overload.? ?The other is many radios at less than 12.6V at the rear of the radio will start to get dirty and at 11.7V will be dirty on TX.? Every one at our site went to LiFePo4 to avoid that as lead voltage sags greatly by time you pulled 40% of the Ah capacity.? ?Or they use charger+genset to keep the battery up. Another way is one genset, two power supplies, two radios as that sets up common mode RF path. Ferrite (lots of it) is your friend. I've seen pictures (even this year) of two people on the same band at the same table at 100W (less an issue with QRP) wondering why they were beating each other up. In the end there are many radios we literally banned, TS440, TS570, ts2000, IC706(all) and a bunch of other oldies.? One answer to anyone that says yabut, Experience with massive and severe keyed noise on multiple bands and band filters were not totally effective. That said why are we even talking about anything outside the bitx group of radios? The monoband bitx are OK on TX but on rx they are still easily overloaded by even K3S in the FD circle.? Sbitx is power hungry and I've not even considered it for the field. However three hams within .6mi easily overload the reciever. -- Allison ------------------ Please use the forum, offline and private will go to bit bucket. |
开云体育Hi, Dave, I would be the first to admit that the 7300 does not have a bulletproof receiver.However, the Alachua County team set up five HF antennas, four of which were in some proximity at the freedom center at our park, based on a 50 foot tower provided for by the county, and one of which was an off-center Fed sloping vertical maybe 100 150 yards south. ? ? It was a ?4F operation with a 6 m station at the alternate site for our EOC? We did manage to operate with only ICOM 7300s, for 22 hours, on eight hours of which we were having two stations on the same band. ? Sometimes as close as CW and FT 8/FT4. ? We did have some difficulties. People had to learn how to turn on the ICOM attenuator, and they also had to learn not to use preamplifiers!!! ?At one point the 40 m CW station was coming in on three receivers, due to less than wonderful choices. After people learned about these tricks and connected up all of the bandpass filters we had built, we proceeded the entire rest of the contest with minimal difficulty. ? Over 1200 contacts, which for our group was phenomenal, because we are still relatively new at this!!!? We did organize our antennas as much as possible to separate them. ?Generally by offsetting them from the tower. See the photograph on page one. ? We just don’t have fantastic equipment, and we decided to go with what we had. ? Preliminary measurements done at our dress rehearsal with a similar antenna set up suggested we had separations between 30 and 60 DB on various bands between various antennas. ?We were not always able to use the optimal separated antennas. ? Our calculation suggested we needed 50 DB or more isolation, and our band pass filters and receiver attenuators helped out a lot I operated several hours at the GOTA ?station, without any bandpass filters, often on the same band as a digital station A few tens of kHz away while I operated CW. By using the attenuator I got away with it. Most of us just don’t have the money for much better than a 7300, and that has been a step up for most of us! ? More power to your group for having better equipment! 73, Gordon Kx4z On Jul 1, 2023, at 15:29, ajparent1/kb1gmx <kb1gmx@...> wrote:
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开云体育The overloading is due to inadequate bandpass filtering on the front end… and the AGC system than it is being an SDR. ? From: [email protected] <[email protected]> On Behalf Of Dave New, N8SBE
Sent: Friday, June 30, 2023 10:08 AM To: [email protected] Subject: Re: [BITX20] First HF Radio? ? Jim, I 2nd Jack's reply.? I notice you said something about maybe doing a Field Day. The IC-7300 would be a great Field Day radio, if you are the only transmitter at the site. Otherwise, in multi-multi Field Days, our experience is that trying to use an IC-7300 is an exercise in frustration, because the direct-sampling receiver fronted in the IC-7300 is easily overloaded by nearby transmitters.? We even tried an IC-7610 this year at the GOTA station, and ended up subbing in my 'spare' Elecraft K3S, which preformed admirably. If you hang out on the Elecraft mailing lists, you will find from time to time someone who is selling their K3 or K3S, because they recently upgraded to a K4 or K4D.? Depending on what options are installed, the resale price will vary considerably, but a stripped down? used 100W K3 with one or two roofing filters might go for about what you are thinking of.? An original 100W K3 with one roofing filter used to sell for $1950 new about fourteen years ago.? Elecraft gear keeps their resale value. We also found out that not all direct-sampling receivers are alike, since my Elecraft K4D performed well.? The only noticeable issue was the Yaesu FTdx101d, when used on FT8 on 20M put out some composite phase noise that I was able to pick up on the K4D which was on 20M CW at the time.? It was enough to be noticeable on the waterfall display, but since we were running CW with a 400 Hz bandwidth, the additional noise was not really noticeable.? This was using multiband dipoles oriented end-to-end for minimal coupling for each station, and about 200 hundred feet apart.? All stations at our 4A with GOTA site were running 100W, and all the remaining stations were K3's with upgraded LO boards or K3S's.? Never heard a peep out of the other stations, unless you got within 15-20 kHz of each other.? We were using contest filters on all the stations, but they don't help at all with in-band issues, since they all cover a complete band, not just a portion of a given band. 73, -- Dave, N8SBE On 2023-06-28 15:16, Jack, W8TEE via groups.io wrote:
? -- …_. _._ |