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Re: [Amps] 87A vs. IC-PW1

To: amps@contesting.com
Subject: Re: [Amps] 87A vs. IC-PW1
From: PA3DUV <pa3duv@planet.nl>
Date: Thu, 23 Feb 2006 22:46:23 +0100
List-post: <mailto:amps@contesting.com>
No, it's manual tune. 9 position band switch,  no aux positions.
Due to the 2 paralled GU84B tetrode tubes and the resulting low impedance 
the tuning is virtually single knob (load) + band switch.

No idea if it's legal in the USA and its Territories. I know there are a 
number of DX4 owners in the US but that doesn't necessary make it legal. 
Driving 300 km/h is legal on the German Autobahn in designated areas und 
Bundeslaender.

Cheers, Dick
PA3DUV



----- Original Message ----- 
From: "Keith Dutson" <kdutson@sbcglobal.net>
To: <amps@contesting.com>
Sent: Thursday, February 23, 2006 10:39 PM
Subject: Re: [Amps] 87A vs. IC-PW1


> Is the DX4 auto-tune like the 87A and PW1?  Comparable in price?  Legal in
> USA?
>
> 73, Keith NM5G
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of PA3DUV
> Sent: Thursday, February 23, 2006 3:01 PM
> To: amps@contesting.com
> Subject: Re: [Amps] 87A vs. IC-PW1
>
> Dave,
>
> I'd vote for the model with max Pout. After all that's where a HF power 
> amp
> is made for.
> The 87 has a 3 dB advantage over the PW1. In that respect it might be a 
> good
> idea not to limit your choice to those 2 models.
>
> My personal experience with the PW1 and the Emtron DX4 is:
>
> PW1 advantages: see  your list below
>
> DX4 advantages:
> Has NO complicated microprocessor controlled circuitry which can break 
> down
> Will load into a 1:3 VSWR The two GU84 tubes are cheap and virtually
> indestructible Gives approx 8 dB advantage in power gain over PW1
>
> During A/B tests on the air the DX4 won hands down.
> I sold the PW1.
>
> Cheers, Dick
> PA3DUV
>
> More info on the DX4: http://groups.yahoo.com/group/emtrondx15/
>
>
>
> ----- Original Message -----
> From: "Dave Burr" <dtburr@speakeasy.net>
> To: <amps@contesting.com>
> Sent: Wednesday, February 22, 2006 6:19 PM
> Subject: [Amps] 87A vs. IC-PW1
>
>
>>I know this seems to be a weird question, but I have the subject amps that
>>I can use with my '7800, and I think one of them needs to go because I can
>>really only use one at a time. There are lots of contesters on this list
>>with some serious experience, so I figured I might bounce this off of you.
>>You might even disagree with my assessment:
>>
>> PW1 Advantages
>>
>> It has an antenna tuner (although what is the point of pumping a bunch of
>> power into your crummy 4:1 VSWR system?)
>> It has a built-in antenna switch
>> It can be connected to two radios
>> It can be remoted
>> It is more or less "instant on"
>>
>> 87A Advantages
>>
>> It is prettier
>> It is quieter (fan noise-wise)
>> It puts out more power
>> Nobody says "Click. I just turned on the Icom"
>>
>> I understand that lots of this is personal preference but I will take
>> others' opinions willingly! (BTW, don't tell me to just by another
>> tranceiver and keep both because I have already accomplished that - and
>> that runs with a 91B that I love)
>>
>> 73 de Dave
>> K9XK
>> _______________________________________________
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>
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