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Author Topic: Interesting Chinesium SI4732 Shortwave/Air/FM  (Read 3581 times)

Offline RobRich

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Re: Interesting Chinesium SI4732 Shortwave/Air/FM
« Reply #30 on: July 12, 2021, 1905 UTC »
An "ATS-25" touchscreen version recently popped up on eBay and similar. I tossed Thom a line, which he posted here:

https://swling.com/blog/2021/07/the-new-ats-25-si4732-receiver-with-color-touch-screen/
Tampa, FL USA | US Map Grid EL88
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148' "Shielded" Loop-on-Ground | 2x 18' End-Fed Verticals | 31' Vertical | 2x PA0NHC MiniWhips

Offline RobRich

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Re: Interesting Chinesium SI4732 Shortwave/Air/FM
« Reply #31 on: August 19, 2021, 0820 UTC »
Interestingly enough my "ATS-20" still is working, even after shoving 12vDC down the antenna connector by accidentally hooking up a power inserter for an active antenna backwards. :o The inserter simply blew its internal fuse. Not sure it would have been that simple without the ESD mods done.

Also, I have not been tossing it around much like a typical portable radio. It is usually on a shelf or on top of my R-2000 on the nightstand.

Have it tuned to 75m for background noise right now. Current antenna is my 148' LoG.
Tampa, FL USA | US Map Grid EL88
Airspy HF+ Discovery | Kenwood R-600 + R-2000 | 2x RTL-SDR V3 + NE602 | Si-Tex 200 | Soft66LC4 | Yaesu FRG-7
148' "Shielded" Loop-on-Ground | 2x 18' End-Fed Verticals | 31' Vertical | 2x PA0NHC MiniWhips

Online Ray Lalleu

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Interesting Chinesium SI4732 Shortwave/FM
« Reply #32 on: September 09, 2021, 1311 UTC »
While they say this is an “Airband” radio, none of the Amazon sellers, nor the SI4732 data sheet, show that it has coverage of 108 thru 136 MHz.  I guess they mean the SW aviation frequencies, not the VHF ones.
'Airband' means 108-136 MHz.
Not on that radio !
Please moderator, remove 'Air' from the subject.
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Offline RobRich

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Re: Interesting Chinesium SI4732 Shortwave/Air/FM
« Reply #33 on: September 11, 2021, 0307 UTC »
I suspect it was intended to mean HF aeronautical, then again, most of the bulk "Chinesium" electronics resellers often do not have much a clue about the tech specs of what they are selling anyway.

Edit: Oh yeah, as of last check, my ATS-20 still is working. I think it is on V3.0.7c firmware, which is a revision behind, so I need to get around to flashing an update.
« Last Edit: September 11, 2021, 0311 UTC by RobRich »
Tampa, FL USA | US Map Grid EL88
Airspy HF+ Discovery | Kenwood R-600 + R-2000 | 2x RTL-SDR V3 + NE602 | Si-Tex 200 | Soft66LC4 | Yaesu FRG-7
148' "Shielded" Loop-on-Ground | 2x 18' End-Fed Verticals | 31' Vertical | 2x PA0NHC MiniWhips

Offline RobRich

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Re: Interesting Chinesium SI4732 Shortwave/Air/FM
« Reply #34 on: October 03, 2021, 0012 UTC »
Spotted perhaps a later revision. It has a ground wire from the front panel back to the main PCB for (AFAIK) "display stability." Not seeing one in my pics, and I do not remember one being present. Suppose I will add it when next opening the radio.

Ordered extra encoders and larger knobs, too. Mine still is working, but cheap VFO encoder is a known trouble spot. I might as well change the small VFO knob if/when going through the replacement effort. Sourced via AliExpress, so I might get them in a month or two. Anyway.
Tampa, FL USA | US Map Grid EL88
Airspy HF+ Discovery | Kenwood R-600 + R-2000 | 2x RTL-SDR V3 + NE602 | Si-Tex 200 | Soft66LC4 | Yaesu FRG-7
148' "Shielded" Loop-on-Ground | 2x 18' End-Fed Verticals | 31' Vertical | 2x PA0NHC MiniWhips