Help needeed with JVC TU-AD1000

lufc2684 · 30-08-2009

I have recently aquirred a JVC TU-AD1000. I dont want it for satallite reception, but to use it for (ATV) Amateur Television. The frequency used for ATV is smack bang in the middle of the receivers frequency.

However when I turn the unit it it flashes SC, which I presume means SKY CARD. I dont have a analouge sky card and wondered if I can change the channels without one. If this is not possible does anyone know where I could get one, I dont think it needs to be a working one.

Thanks in advance
Steve

**rolfw** · 30-08-2009

SC probably means short circuit on the LNB input.

lufc2684 · 30-08-2009

Originally Posted by lufc2684

I have recently aquirred a JVC TU-AD1000. I dont want it for satallite reception, but to use it for (ATV) Amateur Television. The frequency used for ATV is smack bang in the middle of the receivers frequency.

However when I turn the unit it it flashes SC, which I presume means SKY CARD. I dont have a analouge sky card and wondered if I can change the channels without one. If this is not possible does anyone know where I could get one, I dont think it needs to be a working one.

Thanks in advance
Steve

That could be correct because the antenna i made will "short" out the LNB, however I have put a 100pF capacitor in series to stop the 13Vdc that is used to power the LNB.

should I still be able to change channels with the "SC" flasing, do I need a remote to change any of the functions.

Thanks

**rolfw** · 30-08-2009

If the SC is flashing you won't be able to do anything, I presume that it stops when you disconnect the antenna? You should be able to switch off the LNB supply, but don't know whether you require the remote.

I managed to get a Marmitek universal remote to run my old Pace receiver, so may work for your JVC as well.

**Llew** · 30-08-2009

Originally Posted by lufc2684

That could be correct because the antenna i made will "short" out the LNB, however I have put a 100pF capacitor in series to stop the 13Vdc that is used to power the LNB.Thanks

You'll also need some form of preamplification to drive the receiver's tuner, as they are quite deaf without the LNB's L-band amplifier. If you fit one at the masthead, you could use the 13/18V output from the receiver to power it, as long as the DC isolation capacitor is fitted between the antenna and the preamp.

Llew

lufc2684 · 30-08-2009

"SC" did mean short curcuit, the pin was bent.

Ok, I can toggle through the channels, I dont suppose anyone knows what channels are set to what frequency. by that i mean the actuall receiver frequencies, not the LNB

STeve

lufc2684 · 30-08-2009

Originally Posted by Llew

You'll also need some form of preamplification to drive the receiver's tuner, as they are quite deaf without the LNB's L-band amplifier. If you fit one at the masthead, you could use the 13/18V output from the receiver to power it, as long as the DC isolation capacitor is fitted between the antenna and the preamp.

Llew

Llew (or anyone else)

Can you recommend a pre-amp, I know maplin do some kits, but not sure which type i want, Audio/RF/Stereo (i presume Audio and stereo are the same)

**Llew** · 30-08-2009

Doubt that you'll find anything suitable for your purpose in Maplin's. What amateur band(s) are you wanting to receive?

**Llew** · 30-08-2009

Originally Posted by lufc2684

"SC" did mean short curcuit, the pin was bent.

Ok, I can toggle through the channels, I dont suppose anyone knows what channels are set to what frequency. by that i mean the actuall receiver frequencies, not the LNB

STeve

Depends on what the frequency you are trying to receive. If it's from the local beacon transmitting on 23cm, look up the frequency in this list -

_www.g3pho.free-online.co.uk/microwaves/eubcon.htm

As an example, if it's 1316MHz, add it to 9750 (or 10600) if your receiver LNB configuration is set to Universal LNB.

9750+1316 = 11066MHz

10600 + 1316 = 11916MHz

This gives you the two frequencies you need to scan to receive that beacon.

Llew

lufc2684 · 30-08-2009

Originally Posted by Llew

Doubt that you'll find anything suitable for your purpose in Maplin's. What amateur band(s) are you wanting to receive?

I want to receive ATV (and eventually trasmit it) on 23Cms (1240.000-1243.250 MHz)

Maplin do a K1803 Universal Mono Pre-Amplifier and also a 7w and 200w one, but I am unsure what I need.

Thanks
Steve

**Llew** · 30-08-2009

They're audio preamplifiers. You're looking for preamps for the 23cm band. Most preamps for 23cm are usually DIY jobs - ready-made ones are very expensive. Search for "23cm preamplifiers" if you fancy making one yourself, there's several designs available.

lufc2684 · 30-08-2009

Originally Posted by Llew

They're audio preamplifiers. You're looking for preamps for the 23cm band. Most preamps for 23cm are usually DIY jobs - ready-made ones are very expensive. Search for "23cm preamplifiers" if you fancy making one yourself, there's several designs available.

Thanks for that... founf this
_http://www.quasarelectronics.com/smart-kit/1083-3-output-video-signal-amplifier.htm
I think it may do the job.

I dont suppose you know where I can get a remote for the JVC TU-AD1000, just bought a universal one from Argos and guess what.. it dont work.

**Llew** · 30-08-2009

No, you're way off beam. You're need something for the radio amateur 23cm band, that is, 1296MHz - 1325MHz.

Something like this -

_www.shop.tgn-technology.com/product_info.php?language=en&info=p22_MegaAmp-ULNA3013-23-cm-1200--1300-MHz.html&XTCsid=8b498962f0c76caf9090ecef069c597f

As I said, they don't come cheap, and many radio amateurs using this band construct them themselves.

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