Alinco DR-635 poor receiver demonstration

[808FlyBy]

looks like i will be getting the Yaesu ft 8800 then. shame .. alinco radios are a resonable price and look good.

[sweetgyy]

hey i have an alinco 220 radio like that and the rx sucks too

[egalxxx]

man,hat der Wrschtfinger

[ART13autotune]

kerchunk a machine more than once

without ID

[ayrshoredotcom]

I had a very similar problem with my 635 - a D-Star repeater would completely wipe out the channel one up from it (even though the signal on the highger channel was S9). Swapped the rig for a 20 year old Icom, and the problem is gone. Utter garbage, and the UK importer denies ever having heard of these problems. Won't be buying another Alinco and I won't be buying from dishonest Nevada Radio either.

[max2950]

How much power does such a CDMA repeater spit in the air ?

[ok2cmeCZ]

I don't know anything about this repeater. I heard this operator uses about 100-300W ERP in the city.

[max2950]

I'm just new to the hobby and bought a used DR-635...

Your video makes me disappointed about my choice...

One thing that disturbs me about your test is tha dditional low diameter coaxial cable you are using to test the handheld and the Alinco.

Does the FT7800 allow dual receive ? Can you work cross band repeaters easily ? (i.e.: do you need to put the V and U frequencies into a memory channel first or can you work this an easier way...)

[ok2cmeCZ]

That low diameter coax is about 1,5m Belden H155 with N connector on one side and PL (SO-239) on other side, because FT-7800 has an N and DR-635 has PL. For demostration, that the problem isn't in this cable, was on that cable connected handheld Kenwood.

[ok2cmeCZ]

Dual receive on FT-7800 isn't possible, it has only one receiver. For crossband repeater operation is necesarry to save both frequencies to split frequency memory. It's disadvantage of this transceiver, it isn't designed for this operation. But after this test in my home conditions I think Alinco is designed only for mobile usage with non efficient ANT outside a civilization.

I don't have anything against Alinco brand, they have a lot of good transceivers, but in my opinion DR-635 isn't.

[ok2cmeCZ]

PS: I have tested two new DR-635 and both with the same result.

[max2950]

Thank you for your feedback, for sure the small length of thin coaxial cable won't make a difference. Actually the problem you are pointing in your video is that the Alinco's front end is easily overloaded in RF crowded areas.

What antenna were you using to do this test ?

[ok2cmeCZ]

The test was done with home made dual band coaxial antenna published on PA0FBK's webpage (about 5dBd on 430MHz) tuned precisely to 435MHz. Antenna is placed on our house (about 16 meters above ground and is fed through 22 m of Belden H1000 coaxial.

The nearest CDMA repeater, that I think causes this problems, is about 0.5km distant from my home.

[max2950]

PS / I didn't know this type of antenna i'm having a look, might be a small winter project ;) thanks.