[RTTY] bandpass filters

[James C. Hall, MD]

Jeff:

Yes, I looked at the Array Solutions units, but boy, do they think a lot of them ! The TXBPF was a way to get building experience with SMD's and really get in the weeds on what these units actually do and how to measure it. It was a great ham radio experience - and they work very well. Plus I saved many dollars ! :)

73, Jamie
WB4YDL

Sent from my iPad

> On Mar 18, 2016, at 8:19 PM, Jeff AC0C <keepwalking188 at ac0c.com> wrote:
> 
> The best adjacent band rejection I have measured is off the Array Filtermax 6- band unit.  Amazing.  They will run 200w just fine.
> 
> I run the 5B4AGN units here which don't quite have the same rejection characteristics as the Filtermax but (discounting your labor) are much more affordable.  They also use custom-built RF-spec caps and I think are probably indestructible even into squirrely SWR up on higher bands (the filtermax units use paralleled ceramic discs).
> 
> The Dunestars are cheaper but are a build quality lower.  Similar in performance to the 5B4AGN filter.
> 
> The ICE units should not be used as they have a reputation for failing on high bands.
> 
> K9YC had a pretty good comparison in NCJ a couple of years back which covers all of these save the Filtermax.  If you are going to lay out the bucks for this and are are serous about So2r it's well worth hunting the article down.
> 
> 73/jeff/ac0c
> www.ac0c.com
> alpha-charlie-zero-charlie
> 
> -----Original Message----- From: WW3S
> Sent: Friday, March 18, 2016 6:20 PM
> To: rtty at contesting.com
> Subject: [RTTY] bandpass filters
> 
> Whats everyone using for low power rtty contesting?
> 
> Anyone using Dunestar and pushing 100w to them? How about the newer Hamation 419?
> 
> Or does everyone throttle back to 80-85w, or push 100w?
> 
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