But remember that the spreadsheet only lists "A" (US) models. The "E" variant (European) models will all transmit 430-440MHz without modification.

On 02/01/2021 12:26 saguaroastro <saguaroastro@cox.net> wrote:


Gerald 

Patrick WD9EWK has a pretty comprehensive list on his web site.

Here is a link to the list:

https://linksharing.samsungcloud.com/hr12h4v1M3Wn



73
Rick Tejera (K7TEJ)
Saguaro Astronomy Club
Www.saguaroastro.org
Thunderbird Astronomy Club
Www.w7tbc.org



-------- Original message --------
From: Gerald Payton <gp_ab5r@outlook.com>
Date: 1/2/21 09:43 (GMT-07:00)
To: amsat-bb@amsat.org
Subject: [AMSAT-BB] Popular HT's for satellite work

Such a simple question but I am a loss finding an answer.  I've searched many of the AMSAT Journals and only found photos of people using HT's.  I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.

So, which HT's are being commonly used by members NOW??

If you wish, to avoid clogging the BB, you may answer directly.

73 & Happy New Year
Jerry AB5R 


----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@ngunn.net www http://www.ngunn.net

I am receiving multiple email comments referring to "Better or Best" HT receiver when using dual (two) HT's. Nobody has suggested which T they think is the better on U or V reception. (That excludes desensing or filtering.)

________________________________ From: Tom Schuessler via AMSAT-BB amsat-bb@amsat.org Sent: Saturday, January 2, 2021 1:32 PM To: Don KB2YSI kb2ysi@gmail.com Cc: AMSAT BB amsat-bb@amsat.org Subject: [AMSAT-BB] Re: Popular HT's for satellite work

Another good solution for filtering transmit and receivers is a pair of duplexers. Put one on the 2 m side and one on the 70 cm side with separate feeds to two radios. you can create pretty good isolation between the two radios and avoid defense even on 70 cm with 2 m up. Just make sure you have a 70 CM Radio that has one of the better receivers so it is not just affected by the ambient RF field.

73 Tom N5HYP Sent from my iPhone

On Jan 2, 2021, at 12:14, Don KB2YSI kb2ysi@gmail.com wrote:

 I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well.

There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too.

On Sat, Jan 2, 2021, 11:44 Gerald Payton <gp_ab5r@outlook.commailto:gp_ab5r@outlook.com> wrote: Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.

So, which HT's are being commonly used by members NOW??

If you wish, to avoid clogging the BB, you may answer directly.

73 & Happy New Year Jerry AB5R

-----------------------------------------------------------

Sent via AMSAT-BB(a)amsat.orghttps://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Famsat.org%2F&data=04%7C01%7C%7C10c0e46dd3254b0f42a808d8af55417e%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637452127984329709%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=2v1Nfk1Dg3uWannLo%2Fr4%2FqNuVuPD0%2FphIulMqA%2BTLoY%3D&reserved=0. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program!

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When you are working weak signal FM always look for -

(a) most sensitive receiver i.e. 0.16 micro-volts, lesser is "best" (b) spurious and image rejection ratio of 60 dB or so, more is "better"

As you know FM works best with strong signals... 73!Umesh, k6vug

On Saturday, January 2, 2021, 11:40:52 AM PST, Gerald Payton gp_ab5r@outlook.com wrote:

I am receiving multiple email comments referring to "Better or Best" HT receiver when using dual (two) HT's.  Nobody has suggested which T they think is the better on U or V reception.  (That excludes desensing or filtering.) From: Tom Schuessler via AMSAT-BB amsat-bb@amsat.org Sent: Saturday, January 2, 2021 1:32 PM To: Don KB2YSI kb2ysi@gmail.com Cc: AMSAT BB amsat-bb@amsat.org Subject: [AMSAT-BB] Re: Popular HT's for satellite work Another good solution for filtering transmit and receivers is a pair of duplexers. Put one on the 2 m side and one on the 70 cm side with separate feeds to two radios. you can create pretty good isolation between the two radios and avoid defense even on 70 cm with 2 m up. Just make sure you have a 70 CM Radio that has one of the better receivers so it is not just affected by the ambient RF field.

73 Tom N5HYP Sent from my iPhone

On Jan 2, 2021, at 12:14, Don KB2YSI kb2ysi@gmail.com wrote:

I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well. There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too.  On Sat, Jan 2, 2021, 11:44 Gerald Payton gp_ab5r@outlook.com wrote:

Such a simple question but I am a loss finding an answer.  I've searched many of the AMSAT Journals and only found photos of people using HT's.  I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated. So, which HT's are being commonly used by members NOW?? If you wish, to avoid clogging the BB, you may answer directly. 73 & Happy New YearJerry AB5R

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I use 2 radios, even while I had a D72. The external recorder, headset, coax tangle was more than enough to push me away from the D72 so I sold it.

I use a TH-D74a on RX, FM and SSB, and an IC-7100 for TX. The build-in recorder on the D74a eliminates a few cables and a whole device from the setup.

As a thread on a VHF contest list just said, "it is your station, do want best fits you!".

On Sat, Jan 2, 2021, 21:41 Stephan Greene ks1g04@gmail.com wrote:

Jerry:

WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!

I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.

Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.

If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.

If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.

Hope this helps, there are several experienced operators responding to your email.

73 Steve KS1G

On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton gp_ab5r@outlook.com wrote:

...

Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.

So, which HT's are being commonly used by members NOW??

If you wish, to avoid clogging the BB, you may answer directly.

73 & Happy New Year Jerry AB5R

---

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--

---

Steve Greene ks1g04@gmail.com <kay ess one gee zero four>@gmail.com

---

---

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I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.

Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.

On Sat, Jan 2, 2021, 23:14 Don KB2YSI kb2ysi@gmail.com wrote:

I use 2 radios, even while I had a D72. The external recorder, headset, coax tangle was more than enough to push me away from the D72 so I sold it.

I use a TH-D74a on RX, FM and SSB, and an IC-7100 for TX. The build-in recorder on the D74a eliminates a few cables and a whole device from the setup.

As a thread on a VHF contest list just said, "it is your station, do want best fits you!".

On Sat, Jan 2, 2021, 21:41 Stephan Greene ks1g04@gmail.com wrote:

...

Jerry:

WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!

I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.

Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.

If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.

If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.

Hope this helps, there are several experienced operators responding to your email.

73 Steve KS1G

On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton gp_ab5r@outlook.com wrote:

...

Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.

So, which HT's are being commonly used by members NOW??

If you wish, to avoid clogging the BB, you may answer directly.

73 & Happy New Year Jerry AB5R

---

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--

---

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---

---

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Steve, It's been extensively discussed on Twitter @AMSAT a while back and I can relate from using my FT-1634 setup using the BLP-200, it is a non-issue for SSB and FM at 5W Dual HTs will be fine. Many rovers are currently using it with no issues with more than 5W power.  Obviously not recommended for high power use!!!

73, Adrian AA5UK

On Sunday, January 3, 2021, 8:42:56 AM CST, Steve Kristoff skristof@etczone.com wrote:

Don,I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ??? Steve AI9IN   ----- Original Message -----From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 09:02 To: Stephan Greene (ks1g04@gmail.com) Cc: Gerald Payton (gp_ab5r@outlook.com), AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options. -----------------------------------------------------------

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Thank  you Paul and Adrian for the info, especially when it comes from your first-hand experience! Steve AI9IN

----- Original Message ----- From: Paul Stoetzer (n8hm@arrl.net) Date: 01/03/21 13:59 To: Adrian Engele (aa5uk@yahoo.com) Cc: Steve Kristoff (skristof@etczone.com), amsat-bb@amsat.org Subject: Re: [AMSAT-BB] Re: Popular HT's for satellite work

At least 70 watts has gone through mine, when a few of us at the AMSAT demo station at Dayton in 2019 hooked up an IC-910. Still works great! I have used mine with 30 watts quite frequently over the past two years that I've had it and it still works fine. I think the power rating assumes a more broadband application where a significant amount of RF is being attenuated. When you're using it to cut off the third harmonic from a transmitter, you're really only asking it to block and convert to heat a few milliwatts of RF at most, the rest is passing through. 73, Paul, N8HM

On Sun, Jan 3, 2021 at 13:44 Adrian Engele via AMSAT-BB amsat-bb@amsat.org wrote:

Steve, It's been extensively discussed on Twitter @AMSAT a while back and I can relate from using my FT-1634 setup using the BLP-200, it is a non-issue for SSB and FM at 5W Dual HTs will be fine. Many rovers are currently using it with no issues with more than 5W power. Obviously not recommended for high power use!!! 73, Adrian AA5UK

On Sunday, January 3, 2021, 8:42:56 AM CST, Steve Kristoff skristof@etczone.com wrote:

Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ??? Steve AI9IN

----- Original Message ----- From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 09:02 To: Stephan Greene (ks1g04@gmail.com) Cc: Gerald Payton (gp_ab5r@outlook.com), AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.

-----------------------------------------------------------

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Thanks to Don, too! Didn't see his reply until later.

Steve AI9IN

----- Original Message ----- From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 15:40 To: Steve Kristoff (skristof@etczone.com) Cc: AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important. On Sun, Jan 3, 2021, 09:42 Steve Kristoff skristof@etczone.com wrote:

Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???

Steve AI9IN

----- Original Message ----- From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 09:02 To: Stephan Greene (ks1g04@gmail.com) Cc: Gerald Payton (gp_ab5r@outlook.com), AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.

-----------------------------------------------------------

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Mini-Circuits BHP-400+. High Pass Filter, 395-3200 MHz. Same form factor as the BLP-200. Seems to help a little.

Steve KS1G

On Sun, Jan 3, 2021 at 6:00 PM Steve Kristoff skristof@etczone.com wrote:

One more question. If I had a BLP-200 on the 2m side would it be useful to have high pass filter on the 70 cm side? If so, does anyone have a recommendation or experience with such a thing?

Steve AI9IN

----- Original Message -----

From: Steve Kristoff (skristof@etczone.com) Date: 01/03/21 15:55 To: Don KB2YSI (kb2ysi@gmail.com) Cc: AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

Thanks to Don, too! Didn't see his reply until later.

Steve AI9IN

----- Original Message -----

From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 15:40 To: Steve Kristoff (skristof@etczone.com) Cc: AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important.

On Sun, Jan 3, 2021, 09:42 Steve Kristoff skristof@etczone.com wrote:

...

Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???

Steve AI9IN

----- Original Message -----

From: Don KB2YSI (kb2ysi@gmail.com) Date: 01/03/21 09:02 To: Stephan Greene (ks1g04@gmail.com) Cc: Gerald Payton (gp_ab5r@outlook.com), AMSAT BB (amsat-bb@amsat.org) Subject: [AMSAT-BB] Re: Popular HT's for satellite work

I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.

Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.

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