Where have all the UVSJ's gone? - Canadian TV, Computing and Home Theatre Forums

 
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post #1 of 5 (permalink) Old 2017-02-08, 02:13 PM Thread Starter
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Where have all the UVSJ's gone?

Scouring the internet today only to find that all of the high quality UVSJ's are discontinued? What's up with that?
Are there any suitable alternatives for combining a UHF antenna and VHF antenna with minimal insertion loss?
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post #2 of 5 (permalink) Old 2017-02-08, 03:17 PM
 
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You might try Tin Lee Electronics. Their products are very high quality.

Here is a link: http://www.tinlee.com/MATV_headend.p...TVBANDSPLITTER

Delhi SFA 1483, Antennacraft Suburban VHF, CM7778
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post #3 of 5 (permalink) Old 2017-02-08, 03:19 PM
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Amazon advertises Blonder-Tongue Z-UVSJ....but shows picture of similar "Tru-Spec" part....you should also check FleaBay for Pico, MACOM, Tru-Spec, Hollands as well as Blonder-Tongue "UVSJ" type devices:
http://www.multicominc.com/wp-conten...dsv_series.pdf [B-T Specifications]
https://www.amazon.com/Blonder-Tongu.../dp/B004BTY700
[Note links to MCM Stellar Labs and Antennas Direct VHF/UHF Combiners in the "Other Items" section.]

OTOH: Radio Shack 15-2586, MCM Stellar Labs 33-2230 and Antennas-Direct VHF/UHF Antenna Combiners have DC PASS on the UHF Port, which is what you want if you insert it AFTER the Preamp, so that VHF (incl Strong FM signals) do NOT go through the Preamp, likely causing Intermodulation and FM Second Harmonic Interference [unlike UVSJ's which erroneously have DC PASS only on the VHF Port]:
https://www.radioshack.com/products/...itter-combiner
Stellar Labs UHF - VHF Antenna Combiner | 33-2230 (332230) | Stellar Labs
https://www.antennasdirect.com/store..._combiner.html

Performance Summary:
Splitters, Attenuators, Filters, Diplexers, Other Signal Gear

Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands

Last edited by holl_ands; 2017-02-08 at 03:35 PM.
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post #4 of 5 (permalink) Old 2017-02-08, 11:32 PM Thread Starter
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Join Date: Oct 2015
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I'm planning on joining my UHF and VHF antennas prior to feeding into my mast mounted Winegard LNA200 preamp, so I am assuming the simple UVSJ is all I need. Just wondering why they have seemed to all but disappeared. They are the simplest, cheapest and most efficient method I have seen.
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post #5 of 5 (permalink) Old 2017-02-09, 07:02 AM
 
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Quote:
Just wondering why they have seemed to all but disappeared.
It appears that both Hollands and Steren (Pico) quit making them.

Quote:
....cheapest ...
They probably concluded that low volume inexpensive accessory items weren't work the hassle of loosing money over. They are businesses, after all, they're not required to make items that they don't make money on - that's the seeming function of government.
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