[Amps] Tube swap

[Karel]

Thank you all who replied to my suppressor questioning. When the weather 
allows me to get to my shack I will review all I have and report later. It 
has been few years when I worked on this amp and it is still waiting for me 
to finish it.

Few years back, when one still could carry tons on the airplane, I picked up 
at the Holice fleamarket (Czech Rep.) couple brand new triode tubes (East 
German made), tons of silver plate on them, perhaps 20 lbs each tube, I 
forgot the nomenclature, but they supposedly need 250 Amps for the heater. I 
will report more details on them later. This might fit the "Weird tubes in 
the amp" title. Just wondering what one might use them for. Sorry for lack 
of detailed info.
So far they are great as a decoration.
Karel, VA3KO
----- Original Message ----- 
From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
To: <amps at contesting.com>
Sent: Wednesday, January 29, 2014 2:03 AM
Subject: Re: [Amps] Tube swap


> On 1/28/2014 6:11 PM, Carl wrote:The handbook has a good section on 
> designing them, but after you get all the info, and calculations, you have 
> to take into account stray inductance and capacitance.  IE, they give you 
> a base design that likely will need to be modified to fit the layout of 
> the amp and tube, or tube. So as Cars says, pick an amp with the same tube 
> and similar lauot and build a supressor like theirs and it'll likely work 
> with little or no modification.
>
> 73
>
> Roger (K8RI)
>
>
>> Suppressors are usually tube and layout/construction dependent for the
>> inductor part.
>>
>> Look at commercial and good HB ham amps that have the tube you want to
>> use and go from there.
>>
>> Having a quality brand of GDO helps a lot as an economical tool..
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- From: "Karel" <kebenstr at bmts.com>
>> To: "Carl" <km1h at jeremy.mv.com>; <donroden at hiwaay.net>;
>> <amps at contesting.com>
>> Sent: Tuesday, January 28, 2014 5:53 PM
>> Subject: Re: [Amps] Tube swap
>>
>>
>>> Thanks Carl,
>>> I just have to figure out what the factory design should be. I will
>>> definitely use ceramic resistor. Any suggested lead to better
>>> suppressor setup?
>>> Values, arrangement? Thanks,
>>> Karel, VA3KO
>>>
>>> ----- Original Message ----- From: "Carl" <km1h at jeremy.mv.com>
>>> To: "Karel" <kebenstr at bmts.com>; <donroden at hiwaay.net>;
>>> <amps at contesting.com>
>>> Sent: Tuesday, January 28, 2014 4:26 PM
>>> Subject: Re: [Amps] Tube swap
>>>
>>>
>>>> Stick to factory designs, they work fine for decades without problems.
>>>> The Ohmite OY series of ceramic resistors do well in place of out of
>>>> tolerance carbon composition.
>>>>
>>>> Sell the voodoo crap on fleabay to a CBer
>>>>
>>>> Carl
>>>> KM1H
>>>>
>>>>
>>>> ----- Original Message ----- From: "Karel" <kebenstr at bmts.com>
>>>> To: <donroden at hiwaay.net>; <amps at contesting.com>
>>>> Sent: Tuesday, January 28, 2014 2:36 PM
>>>> Subject: Re: [Amps] Tube swap
>>>>
>>>>
>>>>> Sorry, I met him over internet right after his write-up for AR
>>>>> Handbook was rejected and that was a long time ago. I brought up his
>>>>> name here once before and got slapped for it, sorry, I should know
>>>>> by now. I owe cup of coffee to all. Hopefully we will meet some day.
>>>>>
>>>>> I still have his suppressor package for two 4-1000A 's to be
>>>>> installed. Without bringing his name out again, can someone warn me
>>>>> about using it?
>>>>>
>>>>> I installed his suppressor package on my friend's Henry 2K. It
>>>>> lasted few years, but his plate transformer croaked recently, I
>>>>> wonder if the suppressor had anything to do with that.
>>>>>
>>>>> Karel Ebenstreit, VA3KO
>>>>>
>>>>> ----- Original Message ----- From: <donroden at hiwaay.net>
>>>>> To: <amps at contesting.com>
>>>>> Sent: Tuesday, January 28, 2014 10:56 AM
>>>>> Subject: Re: [Amps] Tube swap
>>>>>
>>>>>
>>>>>> Quoting Karel <kebenstr at bmts.com>:
>>>>>>
>>>>>>> Hardy,
>>>>>>> yes I made myself a Hi-pot tester as well. I forgot the specs, but
>>>>>>> I believe I can go up to 20 kV. (It may be one of Richard Measures
>>>>>>> designs).
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Unwritten Amps Rule # 1
>>>>>>
>>>>>> Never invoke the name of the witchdoctor.
>>>>>>
>>>>>> You owe everyone a cup of coffee.
>>>>>>
>>>>>>
>>>>>> Don W4DNR
>>>>>>
>>>>>> _______________________________________________
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>>>>>
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>>>
>>>
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>>
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