Friday, December 2, 2022

A Front Panel Protector Cap for the FT-891


After this week's earlier post on getting the FT-891 going, here's one more on getting this thing trail-ready.  Some time back I'd put a set of Portable Zero rails on my FT-817nd, and had added a cardboard cap to protect the front panel when I shove it in a pack next to who-knows-what, so of course I had to do the same for the FT-891.  Looking around for a suitable piece of cardboard to construct this, it was right in front of me: the box the rails came in.  Just had to cut down the width a little, fit it all together, and tape the new end securely.

In pics, here it all is:
Rails installed (l) and the box they came in (r).

Yeah, just the right height.  In fact, made for it.

Mark it before cutting.  Leave some extra for the fold-over tabs; test fit and trim as needed.  Kitchen shears work well here.

Fold over the ends, close with packing tape, and finish with painter's tape to hold it on to the radio.  Done!

To quote Darth Vader, "All too easy."  You can find the rails from Portable Zero here for a price much, much lower than repairing a broken front panel.  Adventure awaits.

Thursday, December 1, 2022

Happy First Day of Not Hurricane Season



Sure, that's yesterday's date.  I queued this up to post yesterday for today.  Doesn't change much (I hope).

Wednesday, November 30, 2022

Time for a Review of the FT-891


TLDR: A potentially great field or even home radio, somewhat hobbled by a clunky user interface (UI).  Well worth the $600 – $650 street price as is, but if the UI and data mode messes got sorted out I would happily pay 50% more.

Pros: Triple-conversion superhet receiver with at 3kHz roofing filter, adjustable noise blanker, and an aggressive digital noise reduction (DNR) chip, all of which work to cut interference very effectively.  Weight and form factor are similar to Yaesu's previous king-of-the-trail, the FT-857d.  A somewhat improved UI, now with three user-programmable front panel keys and a much bigger screen.

Cons: UI still not up to snuff.  Often but inconsistently drops various settings during changes in operating band, mode, or memory channel.  Bizarre offsets in the PSK data mode, and seemingly broken upper bandwidth software-defined control on the general-purpose data mode (but there's a work-around, so read on).

what a mess, on the ladder of success   Testing new hardware is never a neat process.  On to the review.

OK, from the short version above it probably sounds like I don't like this radio, but to the contrary I'm impressed.  Furthermore it is a worthy successor to the venerable FT-857d, and at this price it is too good a rig to pass up.  It just took some wrangling to get past the quirks in the UI and get everything going.

The one setup tip to take away pertains to using an external sound card interface such as a SignaLink.  Simply set things to upper sideband mode and skip all the data mode settings ("PSK" and "Other") altogether.  This will necessitate some jumping into the deep menus to adjust down the TX power when switching between voice to digital, something that is easily forgotten and (if forgotten) not good for the radio's power transistors.  It would have been convenient to set the radio's data mode to 25w and SSB to 100w and forget all this, but there it is.  (This all took two days of spare time to figure out, ugh.)

The remainder of the setup was straightforward.  Also, the radio works well with an external MFJ-939Y autotuner.  That part was plug-and-play, as advertised.

About that direct computer cable data mode input on the back, sure, I'll bet it works great, but I'll never know because the only driver Yaesu has released is for Windows OS.  So it's data via SignaLink and audio input (mercifully, on the data port) for the foreseeable future.

Back to the receiver.  It's a triple-conversion superhet with a staunch roofing filter and a stout digital noise reduction chip acting on an intermediate frequency (IF).  If that sounds like the big FTdx-1200 base station, well, that's essentially what it is.  In a side-by-side comparison of published specs they are only slightly different, and certainly not enough to notice in use.  In a lucky coincidence last week I worked two similar Ohio stations minutes apart, one on my FT-857d and one on the FT-891.  In this RF-noisy location, the step up from the older double-conversion superhet with an audio frequency DNR circuit in the 857 was like night and day.  Most of the useful bandwidth and IF shift controls present on the 1200 are also there with the 891, albeit with most of them buried in the first level of menus.  Well, Yaesu did have to make some concessions to a portable's smaller control panel, so no complaints there.

This brings us back to the UI.  It really is an improvement over the older 857 and its brethren, the FT-817nd and FT-897, which all share the same wretched control set-up.  The three programmable keys on the 891's front panel are a very welcome addition that somewhat redeems the new UI.  Overall though it's just not that much of an improvement, and maybe not enough to justify the change in interface.  Also random flip-flops in control setting when changing bands and modes is a most unwelcome "feature."  Doesn't Yaesu test this stuff?

Perhaps the biggest change from the FT-857d to the new FT-891 is the omission of 2m and 70cm band capabilities.  I hate to see them go, but dumping 2m and 70cm reportedly allows for a more robust transmitter.  Furthermore, the field use for these two line-of-sight bands is so different than the other covered bands that they warrant their own dedicated radio.  Taken together, it makes sense.

For all that, it seems that not everyone is happy with these changes.  The street price of the FT-891 has settled in the low $600's, while just last week two discontinued FT-857d's on MTC Radio's used equipment page were sold at $1000 – about 30% over their original price.  Personally, I'd take a new 891 and a new 2m/70cm dual-bander for about the same money.

To sum it all up, the FT-891 is a potentially great field radio, somewhat hobbled by its clunky UI.  It is well worth the current street price, and if Yaesu got its UI and data mode weirdness sorted out I would happily pay 50% more.  Next radio though... maybe not a Yaesu.  I want to see if another company can pull off the magic and come up with a less ragged UI.  In the meantime though the FT-891's a keeper.

ps, and to ask and answer an obvious question: Why get a new FT-891 when I've got a perfectly good FT-857d that I like so much and is all dialed in?  The 857 is getting up in years, having been bought used and at an unknown age seven years ago.  Also, at this price they're practically giving away 891s these days.  Sometimes you've got to future-proof your camping radio capabilities.

Monday, November 28, 2022

MFJ-939Y tuner works with FTdx-1200


Since putting up my apartment rooftop mini-W3EDP last winter, I've been wrangling it into 50 Ohm functionality with an MFJ-948 manual tuner.  Works fine.  However when switching bands the entire process gets a little tiresome.  Not to mention that I fried one radio some years back with this thing, so I'm still a little gun-shy and overly-cautious when tuning up.  Anyway, it's cumbersome.  So on a lark while testing out the new FT-891 (review forthcoming this week) and swapping cables around, I tried plugging the MFJ-939Y autotuner I'd paired it with into my main home radio, the FTdx-1200.  (Don't forget to go into the menus to switch the tuner from internal to external.) Mind you, the manual didn't exactly say it would work with this radio, but it did mention others in the series so I suspected that it would probably work.  Or maybe just fry a kilobuck of hardware... what'stheworstthatcouldhappen?  So I hooked it all up and:


Yeah, worked great, needn't have worried, should've begun using this thing from the get-go last January.  I'm keeping the manual tuner in the path between the radio and the autotuner however, for both the crossed-needle power/reflected power/SWR display as well as for the coax cable switching capability.

Also note: The 939 powers just fine via the control cable, you don't need to plug it in to 12v separately.  Not clear at all in the manual.  In fact, there's a lot that's not exactly clear in that manual.  Don't sweat it though, because with supported radios it's plug-and-play.  (Almost.  Remember, change the tuner menu setting to external.)

Here, you can read up on the specs at the manufacturer's web site, which includes several informative videos.  I found a like-new one on MTC Radio's used page for about 1/3rd off – a lucky hit – but even at full list the 939 tuner's a bargain.
They make this in several Yaesu-compatible versions, as well as for Icom and Kenwood radios.

The convenience is good to have, at the level of not quite but almost game changing.

Friday, November 25, 2022

Fred Brooks, RIP


It crossed my desk today that Fred Brooks, the author of The Mythical-Man Month died last week.  You can read the NYT obit here and a more personal note from a colleague here.

It is hard to over-state the influence Brooks had on my work, though I am neither in computer science nor had any direct contact with the man.  However, being in computational physics, I have had occasion to work on or even run medium-sized software projects, and found great value in his insights (described previously here).  If a programming project ever turns out to be more than one scientist can handle (in a reasonable time, on budget, on schedule, etc. etc.), reach for Brooks' book.  And if your organization doesn't support you in building the team needed to complete the task at hand and you find yourself in a morass of memory-swapping into a snail's pace of error-prone development, that is a giant clue that it is time to move on.

Black Friday Special


This, from over at xkcd:


Let me add one for the Machiavellian quantum political philosopher on your list: Switch handle for the out-of-control trolley with a screen occluding the observer from the politicians on each branch of the tracks.  (Normalization factor of 1/sqrt(2) applied.  Batteries and indeterminately dead/not-dead cat not included.)

Well that was bloody-minded.  Have a good post-Thanksgiving weekend, all.

Monday, November 21, 2022

Futzing with the FT-891


*grumble*grumble*  It's OK, but piping data into this radio is a pain.  Why the 1500Hz offset in one otherwise useful mode?  *grumble*grumble*  Will try to sort out storing settings in memory this morning, that's always good for a lot of work-arounds.  *grumble*  More later this week, especially if the weather stays bad.

later in the day: Yep, got it working.  Lots of needless fiddly stuff, but work it does and the hard part is done.  Talked (well, texted) to a ham over in Texas on 20m.  All is well, and it's a keeper.  Ordered a roll cage to protect the faceplate & miscellaneous protrusions when backpacking.  Adventure awaits.  But first I'm going to get some sleep.