Hej Dan63!
Jeg synes, at det er en noget usædvanlig funktion eller blot en usædvanlig benævnelse af en sædvanlig funktion
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Jeg har, som du sikkert også har, prøvet at lede lidt rundt på internettet efter nogle spor at gå efter og kunne ikke finde noget andet en på en Fransk hifiside, hvor man skulle være medlem. Det gad jeg alligevel ikke. Men jeg fansdt også noget på Audiokarma - læs gerne nedenstående.
Jeg kan, modsat dig, se, at der i forbindelse med drejeknappen er nogle tal, en skala,, hvor der står "20% - 40% - 60% - 80% samt 100%" - og jeg fandt dette på Audiokarma.org, hvor man også skal være logget ind.:
https://audiokarma.org/forums/index.php ... ck.295633/
Det har åbenbart noget at gøre med, hvis man skal optage på bånd direkte fra tuneren. Håber, at du kan tyde det - ellers vend tilbage. Hvis du finder ud af det, så skriv det gerne her i tråden.
Jeg fandt også dette om Optonica'en på "Tuner information centre" :
"Optonica ST-3636 (1978, $300) search eBay
Our panelist Ray says his research revealed that the ST-3636 is "an earlier all-analog version of the ST-7405." It has 5 FM gangs and 3 AM gangs, wide and narrow FM bandwidth settings, fixed and variable output jacks and a 400-Hz tape calibration tone, but unfortunately also has the overactive 'Opto-Lock' circuitry described in the ST-7405 writeup below. Ray and our panelist Bob speculated that the ST-3636, with 3 narrow filters and 3 IF amps, may be a good performer when modded, particularly for DXing once the lock is defeated. Here's Ray's subsequent report: "We put the ST-3636, sans Opto-Lock, into the tuner shootout system last night. It sat between the TX-9800 and the RFM-815 [modified KT-815 - Editor]. It got whupped! A 21 KW signal from 143 miles away was stereo/narrow listenable on the TX-9800, mono/narrow listenable on the RFM-815 and... no reception at all on the ST-3636. On bigger signals, the ST-3636 sounds similar to the Pioneer, but a little lean compared to the modded Kenwood. I've since removed the antenna circuit balun, which moved the S-meter up about half a pointer's worth. These are all 5-gang tuners, so I expected better from the Optonica. Bob suggests that it needs tweaking up front, and that will eventually get done. Next, though, it gets a matched set of filters from Bill Ammons. It has 4 280s stock, but will get two 280s and a 150 in narrow plus another 280 for wide/narrow on advice from Bob." After having been tweaked by Ray and aligned by Bob, Ray's ST-3636 was reviewed by our panelist Jim on the Modified Tuner Report page. The ST-3636 seems to be fairly common on eBay and usually sells for $25-60.
Desuden er "air check" nævnt her, man uden forklaring:
"Optonica ST-4405 (1981, $250) search eBay
The ST-4405 is an uncommon 4-gang FM-AM tuner that was the baby of the ST-9405/ST-7405 line. It had 5-LED signal-strength and 3-LED tuning meter displays, an air-check calibrator, high blend, FM muting and mode switches, and fixed and variable output jacks. Sensitivity was good but other specs just so-so. The ST-4405 sells for $10-50 on eBay. "
Vh
Freddy