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Messages - M R I

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0410 Hello Redhat. I have you in stereo. Sounding great.

It is nice to see the relay station on the air again. ;D

SDR recording catch. I recorded 1620-1720 kHz last night to see what would turn up. 

You can see it drifted up in frequency after it signed on, probably thermal drift in the oscillator.

As you already know. This is just for others. 8) The best way to keep SDR’ S on frequency is to use a GPS clock frequency source (as done on kiwi’s) if they have a external clock input or a calibrated TCXO OCXO for example. The better SDR’s do. I am amazed by some of the SSB (not AM) recordings I receive off frequency that the listeners think sound good.

Equipment / Re: ICOM ICR-75 vs. TECSUN S-2000
« on: October 08, 2020, 1808 UTC »
wondering, if your R75 has the DSP installed.  Unfortunately mine doesn't have the DSP, and I wonder if lack of DSP in the set makes the narrow filter sounds muffled.
Yes, my only problem with the R75 is that, when the narrow filter is selected, the audio becomes awfully muffled.  Due to this, I have been using it with the Wide filter selected only, but many times, I find it too wide, which gives selectivity problems.

The R-75 has 3 stock filters 15k 6K 2.4K. If properly set up in the filter selection menu (see operation manual) you should be able to access all of them. You likely have it set up wrong. If a filter is selected to off (in the menu) it will sound muffled. The 2.4K filter is to narrow on AM but is still useful on very weak stations. If you off tune the AM station you should hear a difference between the 15K and 6K filters when switching them. I found that my R75 was not set up correctly. Now I have all 3 filters working as W-15K, 6K, N-2.4K. Also if you can get a used or old new stock DSP it works very well.

Equipment / Re: ICOM ICR-75 vs. TECSUN S-2000
« on: October 02, 2020, 1714 UTC »
My R75 has been collecting dust. I fired it up after seeing this post. It is a very good receiver.  Especially for SSB, it needs a TCXO. I need HI FI broadcast audio so I will build a SDR 9 MHz IF board then feed it to a 192Khz sound card with HDSDR with CAT control to sync frequency with the R75. This would make a great setup.

Equipment / Re: Crossed Parallel Loop Antenna - back to passive
« on: September 22, 2020, 1703 UTC »
The S/N factor from the design of this wide band loop antenna is a big factor. Reducing the loops inductance can help. If the gain is not sufficient with your passive transformer you can design a different active per amp circuit with a acceptable noise floor.

Equipment / Re: Crossed Parallel Loop Antenna - back to passive
« on: September 21, 2020, 2150 UTC »
How does this loop antenna compare to a single loop antenna? Sometimes with a proper match with a step up transformer you can achieve good gain to the receiver without the added noise of using a matching preamp.

This was I. Thanks for tuning in.

General Radio Discussion / Re: Allan Weiner buys WHRI
« on: August 14, 2020, 1745 UTC »
It is good to see the dying radio market still holding some interest.

0219 S9 +20 some static. Nice audio punch
0237 S4+ into the UK with very intelligible audio.
0245 S7 - S9  into Iceland

Thanks Redhat on another great show and for playing  “Chris Botti The look of Love”

Also thanks all for tuning in.

General Radio Discussion / Re: End Of Show Songs?
« on: May 16, 2020, 1404 UTC »
Mostly I do not use a closing song because I play a variety of music genres. In the past I used a nice classical song ‘Con te partirò ‘ or ‘Time to Say Goodbye’ by Andrea Bocelli & Sarah Brightman.

QSLs Received / Re: Mix Radio International
« on: May 12, 2020, 0249 UTC »
Thanks Ken for Listening. Also for joining HFU and posting the QSL on Facebook


It was nice to have so many listeners tuning in. I have decided to make up a QSL for this show. If you want one send me your report. Thanks

0055 Thanks Redhat for playing my request. Samantha james - send it out to the universe.

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Item image   Vintage Weston Model 2531 Panel Meter 50 uA movement with 0 to 100 Amp DC Scale