Tecsun has a new model PL-330 that is a DSP/SYNC/SSB model about the size of a PL-310et. I have viewed it at aliexpress and can confirm details. It is under 20 cubic inches and under $100. The current pricing seen there is about US$75. Be aware that this radio uses a Li-Ion flat-pack battery just like a celphone/smartphone. The supplied battery is a BL-5c, also available in the $3 to $5 range. Capacity is about 1000mAhr, and I would recommend a spare. As far as I know, battery charging is in the radio... external chargers for this battery are available. Or you might have an OLD nokia phone that uses this battery, phone chargers are 'more reliable'.

Regards
Paul S. in CT FN31nl

Does anyone know what chipset it uses?

According to the web it's still the Si4735 

Most important question is, can 'soft mute' be disabled? Only little radio I know that permits disabling soft mute is the Sangean DT-800.

The older models of DSP by Tecsun could defeat the Soft-Mute by tuning 1kHz above or below the target frequency. A small increase in volume is needed (very effective at 3kHz BW).

Though not an ULRadio, the Sangean ATS-405 also has an on/off button for Soft-Mute.

Regards
Paul S. in CT FN31nl

Here is a review I found:
https://swling.com/blog/2020/09/tecsun-pl-330-initial-impressions-overview-of-functions-and-operation/

I have reports from aliexpress users that the chipset is a "CD1622" Chinese variant to the SiLabs 4735.
I'm not prying mine open just yet. But I may get around to an external 26650 size LiIon alternate power source. This size in the range of 4000-5000 mAHr.

Regards
Paul S. in CT FN31nl

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The CD1622CB seems to be a dual channel audio amp. The Chinese do make a Si4735 look-alike called a KT0936M. Has LW/MW/FM/SW. Similar specs.

Bill

Yup, thats what I interpreted it to be. Its obviously looking for processed audio input.

Regards
Paul S. in CT FN31nl