Hi,
Thanks for younreply. Could you tell me the NTC's specs
what you are using?how many CCS power rating of your transformer?
I'm considering to using the R-Core transformer, it with good regulation
( due to without air gap),but with larger in-rush current.
73!Hsu
----- Original Message -----
From: "Evert Bakker (PA2KW)" <evert@pa2kw.com>
To: "'Hsu'" <hsu4qro@gmail.com>; "'Adrian Rees (MW1LCR)'" <rees.a@btconnect.com>
Cc: <amps@contesting.com>
Sent: Saturday, February 14, 2009 7:22 AM
Subject: RE: [Amps] Step Start Relay
> I'm using them with rising confidence and pleasure for years now. Less
> hardware, less cost and reliable.
>
> 73's, Evert PA2KW
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Hsu
> Sent: Friday, February 13, 2009 23:22
> To: Adrian Rees (MW1LCR)
> Cc: amps@contesting.com
> Subject: Re: [Amps] Step Start Relay
>
> I have discussed with M.A. Erickson,KK5DR two years ago.
> ,he told me that NTC can not use in step-start,
> It is due to the current rating limted.But I think we can get very large
> current
> rating NTC now. I have not to test it.
> 73!Hsu
> ----- Original Message -----
> From: "Adrian Rees (MW1LCR)" <rees.a@btconnect.com>
> To: <evert@pa2kw.com>; <amps@contesting.com>
> Sent: Friday, February 13, 2009 10:59 PM
> Subject: Re: [Amps] Step Start Relay
>
>
>> Erm, forgive me...NTC ?
>>
>> Adrian
>>
>> -----Original Message-----
>> From: Evert Bakker (PA2KW) [mailto:evert@pa2kw.com]
>> Sent: 13 February 2009 14:47
>> To: 'Adrian Rees (MW1LCR)'; amps@contesting.com
>> Subject: RE: [Amps] Step Start Relay
>>
>>
>> Adrian,
>>
>> Just use a NTC and you can just put it in the same cabinet.
>>
>> 73's, Evert PA2KW
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
>> On Behalf Of Adrian Rees (MW1LCR)
>> Sent: Friday, February 13, 2009 15:07
>> To: amps@contesting.com
>> Subject: [Amps] Step Start Relay
>>
>> Hi all
>>
>> I am near completion of the re-build of the power supply of my Dentron
>> ML2500 linear, and all is well. I now wish to add a Step Start facility.
>> However, there is limited space within the case of the linear so an
>> external step start would be in order. (I also have a TL922 as well as a
>> home brew 144MHz Linear, all of which would benefit from a step start
>> facility).
>>
>> I was wondering what duration of delay to use with the step start. I
>> think about 250mS - 500mS would be about right. What are the groups
>> thoughts on this ?
>>
>> I have a delay relay that will do the job, as its contacts are rated at
>> 500v at 16A (AC), although the shortest delay on this relay is 1 second.
>>
>>
>> Thoughts anyone ?
>>
>> Thanks
>>
>> Adrian MW1LCR
>>
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>>
>>
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