[amsat-bb] Re: 2 ht vs. 1-duplex ht
tyler.nicholas at att.net
Wed Jan 26 15:16:48 PST 2011
I will second Drew on the FT-530. I picked one up for under $200 that was in awesome condition and it is the best HT I have ever owned (and I have been through a bunch). If you are even luckier, you might find one with the MH-29 speaker mic that has a LCD display on it. You can adjust the downlink frequency with this mic and even see the frequency on it. I also found some massive batteries from W&W manufacturing that make this radio run forever.
For some other full duplex options, you might consider a Kenwood TH-D72. I haven't tried one, but I have seen good reviews on it as a full duplex handheld. It's a little pricey ($500) and unless you want the APRS in it, I would seriously consider an FT-530 or the predecessor to the D72 which is the Kenwood TH-D7A which can be picked up on eBay or elsewhere for a decent price.
I would not recommend the Alinco DJ-G7 for full duplex. They are priced good and will do full duplex, but the receiver has a densense problem when you transmit on 2m. It's a good radio otherwise, but the full duplex performance is very poor unless signals are extremely strong (as in local repeater strong).
I first started using two FT-60s in the beginning and I understand Zach's problem with lugging everything in and out of the house. Two HTs work just fine, but if you are really serious about satellites, I would highly recommend a full duplex HT.
Tyler Nicholas K5TDN
Sent from my iPhone
On Jan 26, 2011, at 3:26 PM, Andrew Glasbrenner <glasbrenner at mindspring.com> wrote:
> On 1/26/2011 4:00 PM, Ted wrote:
>> Zach, there are a lot of VUCC's out there that use exactly what you have...
>> Most here will argue that you HAVE to be duplex....a lot get by without it
> No, just that it is a more productive and considerate way of operating.
> A lot of the congestion you hear on AO-51 is due to stations either not
> knowing, or not caring, that they are in competition for the uplink.
> Full duplex takes care of half of that. Things are also MUCH different
> when AO-51 is over the west coast with it's considerably lower density
> of hams.
> To answer your question Zach, it's all about your personal budget and
> needs. Adding a 2nd HT is probably the cheapest route, but adds more
> complication than a single full duplex HT. Maybe you could try borrowing
> an HT to try it with two? If you want to go with a single full duplex
> HT, there are lots of older ones out there in good condition used. I saw
> an FT-530 the other day with a ton of accessories going for less than a
> new single band. That is one of the finest full duplex radios ever made
> for satellites.
> Another trick is to take the Arrow off the tripod and hold it by hand
> where you can rapidly twist it to peak the signal due to polarity
> differences. With full duplex you can even do this while transmitting to
> clear up a ratty uplink. Check out
> http://www.youtube.com/watch?v=XTqjQ9xIQQE for an example of how much
> polarity plays in signal strength on AO-51 with an Arrow (or Elk, or any
> linear antenna).
> 73, and good luck on the air,
> Drew KO4MA
> AMSAT-NA VP Operations
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