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Denon TU-260

AM/FM Stereo Tuner (1990-91)

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Denon TU-260


Type: Mono/Stereo Tuner

Tuning Bands: FM, MW, LW

Tuning Scale: Digital

FM Tuning Range: 87.5 to 108 MHz

MW Tuning Range: 522 to 1611 kHz

LW Tuning Range: 153 to 279 kHz

Sensitivity: 0.9uV (FM), 18uV (MW), 30uV (LW)

Signal to Noise Ratio: 76dB (FM), 53dB (MW), 50dB (LW)

Distortion: 0.8% (FM)

Selectivity: 70dB (FM)

Dimensions: 434 x 75 x 239mm

Weight: 2.5kg


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re: TU-260L

Hi all.
I have been given a Denon 260L tuner which has come with all the original contents except the FM antenna adapter (which I am assuming is purely to enable the plugging in of the coax aerial plug, and not some mystery electrical component).
I am currently using an ancient Sanyo FMT 200K with which I get perfect FM reception for all stereo transmissions using my aerial setup... tv loft aerial with amplifier with feed to the tuner.
The Denon, although giving very clear reception in mono across the range when using my normal aerial set up, fails to stabilise on any stereo signal when using auto or manual search. All the stereo transmissions it does "blink" at are muffled in quality. (When using the supplied indoor FM aerial instead, it only occasionally finds at most two stable stereo transmissions). At all other known stereo channel frequencies, the stereo indicator blinks which I assume means that it is not fine tuning accurately for some reason.
I have tried every possible permutation of aerial input - the supplied indoor antenna alone, my loft aerial with and without the amplifier, and with and without the AM loop aerial attached.
I have read that sometimes this can be caused by the tuner requiring rebooting to sort things out but can find no information on how to achieve this for this particular model, if indeed it is possible.
Would the addition of an omni-directional loft aerial in the loft, and connected to the tv cable, be a solution?
Can anyone shed any light on the cause of my problem?
Many thanks in advance.

re: TU-260

All the info on offer here relates to the MKI version. The MK II has a completely different PCB setup/layout. If anyone has the schematic for the MKII I would be very interested in obtaining a copy.

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