Bandpass for P25

[Merovingian]

Does anyone know of a good bandpass filter for the 850-860 MHz frequency range and maybe for the 935-940 MHz range. I've spent the last few days searching; previous posts have had links for filters some years back but the links no longer work. I found one company that has a filter like I want but they said they only sell to companies, not individuals. I found a couple of posts on eBay of something close but it looks like surplus and it is coming from Israel so it will take 4-6 weeks to get here, if it even works. . . I tried asking Pare Electronics but they say they are swamped and have no time for R&D.

Anyone know where I could order a couple from?

Thanks

 

[vagrant]

Commercial

Intermod Radio Filters

www.ocicom.com

DCI Digital Communications

 

[Merovingian]

Commercial

Intermod Radio Filters

www.ocicom.com

DCI Digital Communications

Thanks! I'll take a look.

 

[Thunderknight]

These folks have all kinds of RF filters. But look closely, many connector options.

RF Filters - Bandpass Filter | Low-pass Filter | High-pass Filter | Band-stop Filter | Diplexers and Triplexers - Mini-Circuits

Mini-Circuits is a global leader in the design and manufacturing of RF, IF, and microwave components from DC to 86GHz.

www.minicircuits.com

 

[Merovingian]

These folks have all kinds of RF filters. But look closely, many connector options.

RF Filters - Bandpass Filter | Low-pass Filter | High-pass Filter | Band-stop Filter | Diplexers and Triplexers - Mini-Circuits

Mini-Circuits is a global leader in the design and manufacturing of RF, IF, and microwave components from DC to 86GHz.

www.minicircuits.com

Thanks! That is one of the first places I looked. I couldn't find anything for the range I needed.

 

[iMONITOR]

BPF-800-EN | Scanner Master

BPF-800-EN

www.scannermaster.com

 

[vagrant]

I am doubtful any have the range you need in stock. You’ll probably need to custom order.

 

[Merovingian]

View attachment 99100

BPF-800-EN | Scanner Master

BPF-800-EN

www.scannermaster.com

Hey!! Thats something!! Maybe that would work. . . I don't know why it didn't come up in all of my searching.

Thanks a lot!

 

[Merovingian]

I am doubtful any have the range you need in stock. You’ll probably need to custom order.

I already sent a message to DCI, just to see what they say. Theirs may be too expensive, if they will even make it.

 

[iMONITOR]

Hey!! Thats something!! Maybe that would work. . . I don't know why it didn't come up in all of my searching.

Thanks a lot!

Your welcome. If you buy one please follow up on your post and let us know how it worked.

Thanks,
Bill

 

[Merovingian]

Your welcome. If you buy one please follow up on your post and let us know how it worked.

Thanks,
Bill

I will try, it may be a while before I get it up and running. I had ordered 2 L-com HGV-906U 800/900 MHz 6 dBi Omnidirectional Antennas yesterday for $63. I got an email from the company saying they were out of stock. Now I have to find 2 more at a decent price as well as the other components I need.

 

[iMONITOR]

I will try, it may be a while before I get it up and running. I had ordered 2 L-com HGV-906U 800/900 MHz 6 dBi Omnidirectional Antennas yesterday for $63. I got an email from the company saying they were out of stock. Now I have to find 2 more at a decent price as well as the other components I need.

L-Com HGV-903U 800/900 MHz 3 dBi Omnidirectional Antenna

Southern Electronics has provided Electrical, Electronics, Security, Audio/Video, Surveillance, Data Networking, and Automation Controls for over 90 years!

southernele.com

$84.71/ea best I could find today.

 

[Merovingian]

L-Com HGV-903U 800/900 MHz 3 dBi Omnidirectional Antenna

Southern Electronics has provided Electrical, Electronics, Security, Audio/Video, Surveillance, Data Networking, and Automation Controls for over 90 years!

southernele.com

$84.71/ea best I could find today.

Thanks. I see it is the 3dBi version. I will put it on my list and continue searching.

 

[Merovingian]

L-Com has the 6dBi version for $77.59. A bit cheaper than Southern Electronics for the 6dBi version.

https://www.l-com.com/wireless-antenna-800-900-mhz-6-dbi-omnidirectional-antenna

 

[737mech]

Dale at PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts is very helpful and makes custom filters.

 

[Merovingian]

Dale at PAR Electronics | Filters for the commercial 2 way market, MATV, FM broadcast, laboratory, marine industry, amateur radio, scanner and short wave listening enthusiasts is very helpful and makes custom filters.

They were among the first I contacted. He said they were buried in orders and had no time for R&D.

 

[737mech]

They were among the first I contacted. He said they were buried in orders and had no time for R&D.

Wow! Good news for Dale but bad news for you. If not in a hurry I'd tell Dale," Let me know when". He makes quality stuff. This is the first time I've heard of him being too busy??

 

[Merovingian]

Wow! Good news for Dale but bad news for you. If not in a hurry I'd tell Dale," Let me know when". He makes quality stuff. This is the first time I've heard of him being too busy??

While searching this forum the other day, I found a post someone else had made back in 2014, I think, asking for a custom filter but the person was told that they were slammed with some sort of project so they couldn't make a filter for them either. I've contacted DCI already to see what they say, if it is too expensive iMonitor sent me a link to a filter that may be okay.

 

[prcguy]

Here is a great filter for the 935-941MHz range and these have super tight skirts. CELWAVE FILTER 5098-5-10 rack mount 935-941 MHZ BRAND NEW SEALED IN BUBBLE WRAP | eBay

Similar units show up for the 851 to 860 something band for good prices.

 

[prcguy]

Aah, this one might do for your 850-860 range. Celwave 0182452V05 851-866MHz Filter | eBay