On Sun, May 17, 2020 at 03:09 PM, jcfontario wrote:

I have a CC Skywave portable radio, but I am not familiar with what a "supercharged" Skywave receiver has that I don't have. What do I need to add to my travel portable?

Hi John,

A "supercharged" Skywave refers to a model with a 7.5 inch transplanted loopstick. This modification greatly increases MW band sensitivity compared to the stock CC Skywave, transforming the radio into something like a dream travel portable.

Unfortunately, the technical procedure for creating this "dream travel portable" is somewhat of a nightmare. The Skywave portable is extremely compact, and crammed with components which fit together like a twisted puzzle. In addition, the RF circuit board connections for the loopstick Litz wire leads are in the worst possible place for this type of modification, making the entire procedure a very demanding test of close-order soldering, sharp eyesight and steady nerves. For this reason the modification procedure has never been written up in article form, although about 5 of these models have been constructed and given to friends in the US, Japan and Australia.

Gary DeBock (in Puyallup, WA, USA)  

Hello All,

When both the original PL-310 and PL-380 were introduced by Tecsun in 2009-2010 they were fully reviewed (at http://www.mediafire.com/file/w4yuzhj2kyz/Tecsun_PL-380_Review.pdf/file   for the PL-380, and http://www.mediafire.com/file/q8pbn34i1nangl4/The_Tecsun_PL-310.pdf/file  for the PL-310. Unfortunately, since that time Tecsun has followed the tendency of many Chinese companies to cut the quality of their products in order to increase profits, resulting in new digital quirks (and other issues) in these models.

In 2012 Tecsun removed the shielding around the Si4734 DSP chips in their PL-380 models (and probably in their PL-310's and PL-606 models as well), resulting in a digital whine whenever the display is grasped by the hand. The PL-310 was stripped down into a completely different model to make the lower quality PL-310ET, as described in the 2015 Ultralight Radio Shootout (posted at https://swling.com/blog/2015/03/gary-debocks-2015-ultralight-radio-shootout-review/
In my opinion neither the newer PL-380's nor the PL-310ET are really suitable for important overseas DXpeditions, which are much more demanding because of the rough environments, temperature extremes and travel bumps. The newer C.Crane Skywave and Skywave SSB models lack some of the digital search features of the Tecsun models but have much higher quality overall, including a new DSP chip which outperforms the Tecsun Ultralights in the most important categories (MW sensitivity, freedom from internally generated heterodynes and superior 1 kHz DSP audio). Whenever a friend goes with me on an important overseas DXpedition I always provide them with a "supercharged" CC Skywave model, which is fully capable of tracking down great DX all by itself (such as 1000-Radio Record in the Cook Islands, 1431-Djibouti in Hong Kong, etc.). Unfortunately the CC Skywave models do cost significantly more than the Tecsun Ultralights, but the increased cost is worth it, in my opinion. For someone who cannot afford US $90 for a new Ultralight, the newer PL-380 would be OK if you don't mind the significant digital quirks.

73, Gary DeBock (in Puyallup, WA, USA)
  

On May 17, 2020, at 1:36 PM, Gary DeBock via groups.io <D1028Gary@...> wrote:

Hello All,

When both the original PL-310 and PL-380 were introduced by Tecsun in 2009-2010 they were fully reviewed (at http://www.mediafire.com/file/w4yuzhj2kyz/Tecsun_PL-380_Review.pdf/file   for the PL-380, and http://www.mediafire.com/file/q8pbn34i1nangl4/The_Tecsun_PL-310.pdf/file  for the PL-310. Unfortunately, since that time Tecsun has followed the tendency of many Chinese companies to cut the quality of their products in order to increase profits, resulting in new digital quirks (and other issues) in these models.

In 2012 Tecsun removed the shielding around the Si4734 DSP chips in their PL-380 models (and probably in their PL-310's and PL-606 models as well), resulting in a digital whine whenever the display is grasped by the hand. The PL-310 was stripped down into a completely different model to make the lower quality PL-310ET, as described in the 2015 Ultralight Radio Shootout (posted at https://swling.com/blog/2015/03/gary-debocks-2015-ultralight-radio-shootout-review/
In my opinion neither the newer PL-380's nor the PL-310ET are really suitable for important overseas DXpeditions, which are much more demanding because of the rough environments, temperature extremes and travel bumps. The newer C.Crane Skywave and Skywave SSB models lack some of the digital search features of the Tecsun models but have much higher quality overall, including a new DSP chip which outperforms the Tecsun Ultralights in the most important categories (MW sensitivity, freedom from internally generated heterodynes and superior 1 kHz DSP audio). Whenever a friend goes with me on an important overseas DXpedition I always provide them with a "supercharged" CC Skywave model, which is fully capable of tracking down great DX all by itself (such as 1000-Radio Record in the Cook Islands, 1431-Djibouti in Hong Kong, etc.). Unfortunately the CC Skywave models do cost significantly more than the Tecsun Ultralights, but the increased cost is worth it, in my opinion. For someone who cannot afford US $90 for a new Ultralight, the newer PL-380 would be OK if you don't mind the significant digital quirks.

73, Gary DeBock (in Puyallup, WA, USA)
  

Here's what I recall, but please, double check it... This is top of my head:

PL-310

Goods: antenna jack; real, external tuning knob (you can use two fingers)

Not so good: noticeable soft-mute, in severe fading you need to detune by 1KHz to avoid the audio 'pumping' effect.

PL-380

Good: very little or no soft-mute

Not-so-good: no antenna jack; tuning knob is recessed, you can only use one finger, akin to the volume knob we're used to see with UL receivers.

On Sun, May 17, 2020, 07:15 Rémy Friess <rfriess@...> wrote:

Le 17/05/2020 à 03:16, DXer a écrit :
>
> Both the volume and tuning encoders became 'independent' of me very
> early on. I want to increase the volume, it decreases it and vice-versa.
>
> The tuning encoder is the same, but also decides the tuning speed