[Milsurplus] Quieting A DC/DC Converter

[Bill Cromwell]

Hi Ray,

Nine-volt batteries snap together like Legos. I have been using them for 
B+ quite a while. They ain't going to power your 100 watt TX very long 
though.

73,

Bill  KU8H

On 01/20/2018 03:00 PM, Ray Fantini wrote:
> Two points about this entire discussion. First you never have to worry
> about inverter noise with batteries, and second real men build 60 cycle
> transformer power supplies for there set top and non portable radios!
>
> That being said I have to admit that over the past ten years or so have
> noticed a real war on sixty cycle AC transformer technology.
>
> Its time for us all to step up and do like our fathers did and solder
> nine volt batteries together or brake our back and wallets on huge heavy
> sixty cycle transformers.
>
>
> Ray F/KA3EKH
>
>
>
>
> ------------------------------------------------------------------------
> *From:* milsurplus-bounces at mailman.qth.net
> <milsurplus-bounces at mailman.qth.net> on behalf of Al Klase <ark at ar88.net>
> *Sent:* Saturday, January 20, 2018 11:00 AM
> *To:* milsurplus at mailman.qth.net
> *Subject:* Re: [Milsurplus] Quieting A DC/DC Converter
>
> Gang,
>
> Are there "isolated" versions of these converters?  That would be
> helpful in radios like the BC-348 where the negative output of the dyno
> in above chassis ground.
>
> I don't think isolation is possible with a buck or boost circuit
> topology, as your adding a voltage in series with the input..
>
> Al
>
> On 1/20/2018 12:28 AM, Peter Gottlieb wrote:
>> The one I saw said it was non-isolated so not that one. You will need
>> isolated ones to do that.
>>
>>
>> Peter
>>
>> On Jan 20, 2018, at 12:10 AM, Tom <noflood1 at sonic.net
>> <mailto:noflood1 at sonic.net>> wrote:
>>
>>>   I'm wondering if for a BC-654 could you take two of these, set the
>>> outputs to 250 violts and then wire in series for 500 volts??
>>>
>>>
>>>                                       Tom W6TOM
>>>
>>>
>>>
>>>
>>> On 2018-01-19 13:45, Military Wireless Museum via Milsurplus wrote:
>>>
>>>> On 14 Jan 2018 at 16:35, David Stinson wrote:
>>>>
>>>> > Here's a listing for these DC-DC thingies. It's
>>>> > 390 VDC max.
>>>> >
>>>> > https://www.ebay.com/itm/142555893852
>>>>
>>>> Hmmmm....looks very interesting. I see several other such models by
>>>> different folks on
>>>> eBay.
>>>>
>>>> Has anyone tried these yet?
>>>>
>>>> Ken W7EKB
>>>>
>>>> ---
>>>>
>>>> I've bought some of these and two other types, a 180v and 480v max
>>>> output types. I have the one above powering my ARB set to 240v dc
>>>> and it runs cold but it will need putting in a screened box etc
>>>> before fitting in place of the dyno.
>>>>
>>>> The 480v unit gives 96ma into 5k so should drive a tx even.
>>>>
>>>> Ben.
>>>>
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> <mailto:Milsurplus at mailman.qth.net>
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> --
> Al Klase – N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 
bark less - wag more