Elecraft

Roofing Filters

Classic

List

Threaded

13 messages Options

Mike Harris-9

Roofing Filters

Wandering the web I notice that INRAD are offering K3 Roofers somewhat
less than Elecraft prices.

Regards,

Mike VP8NO
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Clay Autery

Re: Roofing Filters

INRAD makes Elecraft's filters as I understand it...

I'll be getting mine from Elecraft directly.

______________________
Clay Autery, KY5G

On 6/22/2017 8:10 AM, Mike Harris wrote:

> Wandering the web I notice that INRAD are offering K3 Roofers somewhat
> less than Elecraft prices.
>
> Regards,
>
> Mike VP8NO
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Raymond Sills

Re: Roofing Filters

I don't have a K3, or K3S... but if I did, I'd order from Elecraft. After all, if it were not for Elecraft, Inrad would not be making them.

Paying a bit extra to Elecraft is a way to say "thank you" for their wonderful products, and their outstanding customer service.

73 de Ray
K2ULR
KX3 #211

-----Original Message-----
From: Clay Autery <[hidden email]>
To: elecraft <[hidden email]>
Sent: Thu, Jun 22, 2017 10:26 am
Subject: Re: [Elecraft] Roofing Filters

INRAD makes Elecraft's filters as I understand it...

I'll be getting mine from Elecraft directly.

______________________
Clay Autery, KY5G

On 6/22/2017 8:10 AM, Mike Harris wrote:

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

Kevin - K4VD

Re: Roofing Filters

An alternative thought. INRAD makes a decent product and has been around
for years. I've used their roofing filter in my FT-1000 and I think it was
in my FT-897 also(?). If I were looking to refit an existing rig, any rig,
with a roofing filter I'd give serious consideration to INRAD's offerings.

Specifications are a consideration. I'm not sure how the two products
compare in the lab. If both are very similar then I'd say thank you to
INRAD for selling at the lower price.

Don't get me wrong. I really enjoy my Elecraft. One of the best rigs I've
ever owned and definitely the best when portable. But if I want to say
thank you I'll send them a card.

73,
Kev K4VD

On Thu, Jun 22, 2017 at 11:09 AM, Raymond Sills <[hidden email]>
wrote:

> I don't have a K3, or K3S... but if I did, I'd order from Elecraft. After
> all, if it were not for Elecraft, Inrad would not be making them.
>
>
> Paying a bit extra to Elecraft is a way to say "thank you" for their
> wonderful products, and their outstanding customer service.
>
>
>
>
> 73 de Ray
> K2ULR
> KX3 #211
>
>
>
>
> -----Original Message-----
> From: Clay Autery <[hidden email]>
> To: elecraft <[hidden email]>
> Sent: Thu, Jun 22, 2017 10:26 am
> Subject: Re: [Elecraft] Roofing Filters
>
> INRAD makes Elecraft's filters as I understand it...
>
> I'll be getting mine from Elecraft directly.
>
> ______________________
> Clay Autery, KY5G
>
> On 6/22/2017 8:10 AM, Mike Harris wrote:
> > Wandering the web I notice that INRAD are offering K3 Roofers somewhat
> > less than Elecraft prices.
> >
> > Regards,
> >
> > Mike VP8NO
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

Vic Rosenthal

Re: Roofing Filters

In reply to this post by Clay Autery

I recall Wayne saying that Elecraft tested filters received from INRAD for some specific performance characteristics. I don't remember the details.

Vic 4X6GP

> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>
> INRAD makes Elecraft's filters as I understand it...
>
> I'll be getting mine from Elecraft directly.
>
> ______________________
> Clay Autery, KY5G
>
>> On 6/22/2017 8:10 AM, Mike Harris wrote:
>> Wandering the web I notice that INRAD are offering K3 Roofers somewhat
>> less than Elecraft prices.
>>
>> Regards,
>>
>> Mike VP8NO
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

wayne burdick

Re: Roofing Filters

Administrator

Yes. We screen every INRAD filter. Those that don’t meet our dynamic range targets are rejected.

Wayne
N6KR

> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
>
> I recall Wayne saying that Elecraft tested filters received from INRAD for some specific performance characteristics. I don't remember the details.
>
> Vic 4X6GP
>
>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>>
>> INRAD makes Elecraft's filters as I understand it...
>>
>> I'll be getting mine from Elecraft directly.
>>
>> ______________________
>> Clay Autery, KY5G
>>
>>> On 6/22/2017 8:10 AM, Mike Harris wrote:
>>> Wandering the web I notice that INRAD are offering K3 Roofers somewhat
>>> less than Elecraft prices.
>>>
>>> Regards,
>>>
>>> Mike VP8NO
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Ken G Kopp

Re: Roofing Filters

Meaning ya get what ya pay for ... or "value added". (:-))

73!

K0PP

On Jun 22, 2017 10:54, "Wayne Burdick" <[hidden email]> wrote:

> Yes. We screen every INRAD filter. Those that don’t meet our dynamic range
> targets are rejected.
>
> Wayne
> N6KR
>
>
> > On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
> >
> > I recall Wayne saying that Elecraft tested filters received from INRAD
> for some specific performance characteristics. I don't remember the details.
> >
> > Vic 4X6GP
> >
> >> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
> >>
> >> INRAD makes Elecraft's filters as I understand it...
> >>
> >> I'll be getting mine from Elecraft directly.
> >>
> >> ______________________
> >> Clay Autery, KY5G
> >>
> >>> On 6/22/2017 8:10 AM, Mike Harris wrote:
> >>> Wandering the web I notice that INRAD are offering K3 Roofers somewhat
> >>> less than Elecraft prices.
> >>>
> >>> Regards,
> >>>
> >>> Mike VP8NO
> >>> ______________________________________________________________
> >>> Elecraft mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:[hidden email]
> >>>
> >>> This list hosted by: http://www.qsl.net
> >>> Please help support this email list: http://www.qsl.net/donate.html
> >>> Message delivered to [hidden email]
> >>
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:[hidden email]
> >>
> >> This list hosted by: http://www.qsl.net
> >> Please help support this email list: http://www.qsl.net/donate.html
> >> Message delivered to [hidden email]
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Clay Autery

Re: Roofing Filters

In reply to this post by wayne burdick

hence my earlier statement:

"I'll be getting mine from Elecraft directly."

Thousands of dollars in radio fear and people risk niggling problems and
time wasted over a few bucks... Just simply doesn't make sense to me.

73,

______________________
Clay Autery, KY5G

On 6/22/2017 11:54 AM, Wayne Burdick wrote:

> Yes. We screen every INRAD filter. Those that don’t meet our dynamic range targets are rejected.
>
> Wayne
> N6KR
>
>
>> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
>>
>> I recall Wayne saying that Elecraft tested filters received from INRAD for some specific performance characteristics. I don't remember the details.
>>
>> Vic 4X6GP
>>
>>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>>>
>>> INRAD makes Elecraft's filters as I understand it...
>>>
>>> I'll be getting mine from Elecraft directly.
>>>
>>> ______________________
>>> Clay Autery, KY5G

Michael Walker

Re: Roofing Filters

Actually, it is just human nature to do that. For some, every penny counts.

Mike va3mw

On Thu, Jun 22, 2017 at 1:56 PM, Clay Autery <[hidden email]> wrote:

> hence my earlier statement:
>
> "I'll be getting mine from Elecraft directly."
>
> Thousands of dollars in radio fear and people risk niggling problems and
> time wasted over a few bucks... Just simply doesn't make sense to me.
>
> 73,
>
> ______________________
> Clay Autery, KY5G
>
> On 6/22/2017 11:54 AM, Wayne Burdick wrote:
> > Yes. We screen every INRAD filter. Those that don’t meet our dynamic
> range targets are rejected.
> >
> > Wayne
> > N6KR
> >
> >
> >> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
> >>
> >> I recall Wayne saying that Elecraft tested filters received from INRAD
> for some specific performance characteristics. I don't remember the details.
> >>
> >> Vic 4X6GP
> >>
> >>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
> >>>
> >>> INRAD makes Elecraft's filters as I understand it...
> >>>
> >>> I'll be getting mine from Elecraft directly.
> >>>
> >>> ______________________
> >>> Clay Autery, KY5G
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Clay Autery

Re: Roofing Filters

Get what you are saying but I go by what my Dad taught me...

RE: Tools
"Son, Buy the best tool you can find for each job. Save up if you have
to. If you can't afford to buy the tool once, you surely can't afford
to buy it twice."

I apply that rule to tools, equipment, cabling, et al.... because ALL of
those things and more are merely "tools" for me to accomplish some
task. Works for me and less expensive in the long run.

73,

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 6/22/2017 1:04 PM, Michael Walker wrote:

> Actually, it is just human nature to do that. For some, every penny counts.
>
> Mike va3mw
>
> On Thu, Jun 22, 2017 at 1:56 PM, Clay Autery <[hidden email]> wrote:
>
>> hence my earlier statement:
>>
>> "I'll be getting mine from Elecraft directly."
>>
>> Thousands of dollars in radio fear and people risk niggling problems and
>> time wasted over a few bucks... Just simply doesn't make sense to me.
>>
>> 73,
>>
>> ______________________
>> Clay Autery, KY5G
>>
>> On 6/22/2017 11:54 AM, Wayne Burdick wrote:
>>> Yes. We screen every INRAD filter. Those that don’t meet our dynamic
>> range targets are rejected.
>>> Wayne
>>> N6KR
>>>
>>>
>>>> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
>>>>
>>>> I recall Wayne saying that Elecraft tested filters received from INRAD
>> for some specific performance characteristics. I don't remember the details.
>>>> Vic 4X6GP
>>>>
>>>>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>>>>>
>>>>> INRAD makes Elecraft's filters as I understand it...
>>>>>
>>>>> I'll be getting mine from Elecraft directly.
>>>>>
>>>>> ______________________
>>>>> Clay Autery, KY5G
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Bob-270

Re: Roofing Filters

In reply to this post by wayne burdick

Hi Wayne,

Could you elaborate on "dynamic range" in crystal filters? A quick
search did not yield a definition. A SWAG might be another term for ultimate
rejection or it with ripple in the passband...

Just curious.

73,
Bob
K2TK ex KN2TKR (1956) & K2TKR

On 6/22/2017 12:54 PM, Wayne Burdick wrote:

Joe Subich, W4TV-4

Re: Roofing Filters

> Could you elaborate on "dynamic range" in crystal filters?

All crystals have imperfections (flaws). Those flaws create distortion
when the crystal is driven with a high level signal and the distortion
(non-linear response) results in intermodulation distortion (IMD).

The K3/K3S operates the crystal filter at a higher level than many other
receivers. Thus, testing the filters for linearity at the maximum
signal level (equivalent to S9 +40 dB - where the hardware AGC engages)
is important to assure the best possible performance over the entire
operating range of the K3/K3S.

73,

... Joe, W4TV

On 6/22/2017 3:12 PM, Bob wrote:

> Hi Wayne,
>
> Could you elaborate on "dynamic range" in crystal filters? A
> quick search did not yield a definition. A SWAG might be another term
> for ultimate rejection or it with ripple in the passband...
>
> Just curious.
>
> 73,
> Bob
> K2TK ex KN2TKR (1956) & K2TKR
>
>
> On 6/22/2017 12:54 PM, Wayne Burdick wrote:
>> Yes. We screen every INRAD filter. Those that don’t meet our dynamic
>> range targets are rejected.
>>
>> Wayne
>> N6KR
>>
>>
>>> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
>>>
>>> I recall Wayne saying that Elecraft tested filters received from
>>> INRAD for some specific performance characteristics. I don't remember
>>> the details.
>>>
>>> Vic 4X6GP
>>>
>>>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>>>>
>>>> INRAD makes Elecraft's filters as I understand it...
>>>>
>>>> I'll be getting mine from Elecraft directly.
>>>>
>>>> ______________________
>>>> Clay Autery, KY5G
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

wayne burdick

Re: Roofing Filters

Administrator

We actually test at higher levels than this.

The hardware AGC is *after* the crystal filter. Gain control prior to the filter is in discrete steps under control of the user: preamps and attenuator sections.

Wayne
N6KR

> On Jun 22, 2017, at 1:20 PM, Joe Subich, W4TV <[hidden email]> wrote:
>
>
> > Could you elaborate on "dynamic range" in crystal filters?
>
> All crystals have imperfections (flaws). Those flaws create distortion
> when the crystal is driven with a high level signal and the distortion
> (non-linear response) results in intermodulation distortion (IMD).
>
> The K3/K3S operates the crystal filter at a higher level than many other
> receivers. Thus, testing the filters for linearity at the maximum
> signal level (equivalent to S9 +40 dB - where the hardware AGC engages)
> is important to assure the best possible performance over the entire
> operating range of the K3/K3S.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 6/22/2017 3:12 PM, Bob wrote:
>> Hi Wayne,
>> Could you elaborate on "dynamic range" in crystal filters? A quick search did not yield a definition. A SWAG might be another term for ultimate rejection or it with ripple in the passband...
>> Just curious.
>> 73,
>> Bob
>> K2TK ex KN2TKR (1956) & K2TKR
>> On 6/22/2017 12:54 PM, Wayne Burdick wrote:
>>> Yes. We screen every INRAD filter. Those that don’t meet our dynamic range targets are rejected.
>>>
>>> Wayne
>>> N6KR
>>>
>>>
>>>> On Jun 22, 2017, at 9:46 AM, Vic Rosenthal <[hidden email]> wrote:
>>>>
>>>> I recall Wayne saying that Elecraft tested filters received from INRAD for some specific performance characteristics. I don't remember the details.
>>>>
>>>> Vic 4X6GP
>>>>
>>>>> On 22 Jun 2017, at 17:14, Clay Autery <[hidden email]> wrote:
>>>>>
>>>>> INRAD makes Elecraft's filters as I understand it...
>>>>>
>>>>> I'll be getting mine from Elecraft directly.
>>>>>
>>>>> ______________________
>>>>> Clay Autery, KY5G
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]