Hi Hugh,
"CINTA" CNT 400 is a Times Microwave LMR 400 knock off. Virtually the same,
but made in China under the auspice of Andrew Corp. Andrew, for the most
part, has been synonymous with good to high quality and a leader in
broadcast associated materiel. Others (Harbour, Commscope) have done LMR
knock-offs but having been in the wire/cable/RF connector and related
commercial biz for years, I have seen the LMR name still highly prevail.
More importantly, I have refrained from selling CINTA , although less
expensive vs. LMR, because even before the quality issues of various China
products became even more greatly illustrated over the last year, I have
input as to the varying QC of this CINTA product....thus I will not sell it.
However, if you are using at HF, and if you have a supplier who would accept
your test results, or give you a no-fee return if n/acceptable (even using
an MFJ type analyzer), you stand a reasonable chance at finding at HF that
your cable will perform electrically well (CINTA 400 will have same
attenuation and electrical characteristics, within very small tolerance, if
any, of LMR 400, when the dielectric was "brewed and extruded properly".
Also, look closely at the specs of either LMR400 or Cinta vs. the length you
need vs. the actual attenuation and then compare to a good RG-213 vs. the
cost comparison and see if you really need
the possibly slight attenuation advantage (to each his own of course, and to
each budget vs. $/dB non-attenuated). Paying extra for a low loss cable
such as this, for HF, is often this sort of close comparison.
LMR 400 specs below 30 MHz may be on their graph, or contact me direct and
give me a couple freq's, or go to TimesMicrowave.com , choose the LMR
product category, or better yet, try their on-line calculator for
attenuation, a great tool, and you can pick many RG cables they make, to see
attenuation comparisons (varied by exact freq and exact length), then come
to DAVIS RF and we will get you an equivalent cable (or we can provide the
more expensive Times or Belden) that will perform very close, or same, as
Times or Belden).... of course at highly competitive pricing.
If I can help further, just let me know.
73,
Steve Davis, K1PEK
DAVIS RF Co.
Commercial Wire, Cable, RF Connectors and Custom/Specialty Cable Design
Engineering
sdavis@DavisRF.com
978-369-1738
Date: Mon, 24 Mar 2008 09:35:57 -0000
From: "Hugh Anthony Quinn" <gi0wlw@btinternet.com>
Subject: [TowerTalk] Andrew CNT400.
To: <towertalk@contesting.com>
Message-ID: <003f01c88d92$7727d560$0200a8c0@acw3559>
Content-Type: text/plain; charset="iso-8859-1"
Is this coax suitable for use at HF?
The spec sheets on the web quote loss figures for 30mhz and above.I can get
some here in Ireland at a good prrice,but only if it is suitable for HF.
Has anyone any experience of using it?
Hugh GI0WLW
Tel: 978-369-1738 Fax: 978-369-3484
NOTE: Please include all past email history with all followup emails until
your order or inquiry is complete. Thank you.
Steve Davis, Jeff Stimson and the staff of the
DAVIS/ORION Group of Companies
Where Customer Satisfaction is our Premier Goal
~ Davis RF Co., Div. of Orion Wire Co.,Inc.
Distribution to numerous industries, Andrew
Heliax; Times Microwave LMR; RFS Celwave and others.
Cable design engineering. RF Peripherals.
www.davisRF.com
Tel: 1-800-328-4773 (1-800-DAVIS RF) Tech'l: 1-978-369-
1738, Fax: 1-978-369-3484
~ DAVIS/ORION Marine Wire and Cable Co., Distribution and Design: UL/USCG
Marine Stds. Tel: 877-242-2253 Fax: 603-787-2221 (Direct tel to Steve
Davis: 978-369-1738 or Fax: 978-369-3484)
~Orion Wire Co., Inc., Design Engineers of Specialty/Custom Cable
Tel: 1-800-328-4773, 1-603-787-2200 Fax 1-603-787-2221,
email: j_stimson@davis-orionwiregroup.com
www.davisRF.com
----- Original Message -----
From: <towertalk-request@contesting.com>
To: <towertalk@contesting.com>
Sent: Monday, March 24, 2008 12:00 PM
Subject: TowerTalk Digest, Vol 63, Issue 57
> Send TowerTalk mailing list submissions to
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>
> Today's Topics:
>
> 1. Andrew CNT400. (Hugh Anthony Quinn)
> 2. Re: Johnson Matchbox (Bill N1eY)
> 3. Re: Johnson Matchbox (sabrams@nycap.rr.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 24 Mar 2008 09:35:57 -0000
> From: "Hugh Anthony Quinn" <gi0wlw@btinternet.com>
> Subject: [TowerTalk] Andrew CNT400.
> To: <towertalk@contesting.com>
> Message-ID: <003f01c88d92$7727d560$0200a8c0@acw3559>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Is this coax suitable for use at HF?
> The spec sheets on the web quote loss figures for 30mhz and above.I can
> get some here in Ireland at a good prrice,but only if it is suitable for
> HF.
>
> Has anyone any experience of using it?
>
> Hugh GI0WLW
>
> ------------------------------
>
> Message: 2
> Date: Mon, 24 Mar 2008 07:19:22 -0400
> From: Bill N1eY <whobulk3@comcast.net>
> Subject: Re: [TowerTalk] Johnson Matchbox
> To: Jim Brown <jim@audiosystemsgroup.com>
> Cc: Towertalk <towertalk@contesting.com>
> Message-ID: <47E78E3A.2040900@comcast.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Well, aren't there two versions of the Johnson Matchbox? One was lower
> power and the other was QRO.
>
> Jim Brown wrote:
>> On Sun, 23 Mar 2008 21:32:43 -0700, Tom Osborne wrote:
>>
>>
>>> Ran 500 watts with the SB-200 and it didn't even get warm.
>>>
>>
>> Dissipation depends on the voltage and current in individual
>> components, which in turn depends on the exact values of complex
>> impedances being transformed, the frequency, and, of course, the
>> power level. A capacitor that runs cool under one set of conditions
>> may go up in smoke under a different set.
>>
>> Not to worry -- excessive dissipation is usually signalled by a
>> special alarm that seasoned hams know well -- you begin to smell
>> them getting warm!
>>
>> 73,
>>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 24 Mar 2008 08:48:09 -0400
> From: <sabrams@nycap.rr.com>
> Subject: Re: [TowerTalk] Johnson Matchbox
> To: "Towertalk" <towertalk@contesting.com>
> Message-ID: <000d01c88dad$50b9ed80$6500a8c0@userg2asvv4l2m>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Many years ago I ran a Heath Warrior at 800w thru my 250 Matchbox and it
> never got warm, but when I looked inside, the plastic(?) coil form had
> melted around the coil wires . Check inside! GL 73 Saul K2XA
> ----- Original Message -----
> From: "Jim Brown" <jim@audiosystemsgroup.com>
> To: "Towertalk" <towertalk@contesting.com>
> Sent: Monday, March 24, 2008 12:59 AM
> Subject: Re: [TowerTalk] Johnson Matchbox
>
>
>> On Sun, 23 Mar 2008 21:32:43 -0700, Tom Osborne wrote:
>>
>>>Ran 500 watts with the SB-200 and it didn't even get warm.
>>
>> Dissipation depends on the voltage and current in individual
>> components, which in turn depends on the exact values of complex
>> impedances being transformed, the frequency, and, of course, the
>> power level. A capacitor that runs cool under one set of conditions
>> may go up in smoke under a different set.
>>
>> Not to worry -- excessive dissipation is usually signalled by a
>> special alarm that seasoned hams know well -- you begin to smell
>> them getting warm!
>>
>> 73,
>>
>> Jim K9YC
>>
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
>
>
>
> ------------------------------
>
> _______________________________________________
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> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> End of TowerTalk Digest, Vol 63, Issue 57
> *****************************************
>
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