[Boatanchors] [Amps] SB 200 problem

rbethman rbethman at comcast.net
Fri May 4 15:13:16 EDT 2012


NTE cross is NTE109.

PRV = 100V
Forward drop, (Isub f=200mA) = 1.0V

NTE has a PDF on this item.

Bob - N0DGN

On 5/4/2012 3:03 PM, Geoff wrote:
> You want at least the same PIV as the original 1N191, whatever that is.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Gary Schafer"<garyschafer at comcast.net>
> To: "'RAY FRIESS'"<rayfrijr at msn.com>;<amps at contesting.com>;
> "'boatanchors'"<boatanchors at mailman.qth.net>
> Sent: Friday, May 04, 2012 11:21 AM
> Subject: Re: [Boatanchors] [Amps] SB 200 problem
>
>
>> Not too long ago I bought some 1N34 diodes at radio shack. I don't know if
>> they still have them.
>>
>> 73
>> Gary  K4FMX
>>
>>> -----Original Message-----
>>> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
>>> bounces at mailman.qth.net] On Behalf Of RAY FRIESS
>>> Sent: Friday, May 04, 2012 10:58 AM
>>> To: gzook at yahoo.com; amps at contesting.com; boatanchors
>>> Subject: Re: [Boatanchors] [Amps] SB 200 problem
>>>
>>>
>>>
>>> If it turns out to be a bad diode, and I cant gind a germanium, can I
>>> use a regular power supply type diode to replace it? Date: Fri, 4 May
>>> 2012 07:55:45 -0700
>>> From: gzook at yahoo.com
>>> Subject: Re: [Amps] SB 200 problem
>>> To: rayfrijr at msn.com; amps at contesting.com; boatanchors at mailman.qth.net
>>>
>>> Check the germanium diode that provides the voltage for the "forward"
>>> or, in this case, the power output, indication.  There are 2-diodes, 1
>>> for forward and 1 for reverse (SWR position).  It sounds like the
>>> forward diode is bad.  Very common!
>>> Also, clean the meter switch. Glen, K9STH
>>>
>>> Website:  http://k9sth.com
>>>          From: RAY FRIESS<rayfrijr at msn.com>
>>>   To: amps at contesting.com; boatanchors
>>>   <boatanchors at mailman.qth.net>; FLBOATANCHORS
>>> <flboatanchors at yahoogroups.com>
>>>   Sent: Friday, May 4, 2012 9:30 AM
>>>   Subject: [Amps] SB 200 problem
>>>
>>>
>>>
>>>
>>>
>>>
>>> I have a Heath SB 200 amp that is working fine with one exception.   The
>>> meter is not functioning in the power out position.It reads fine for
>>> high voltage, grid, and SWR functions, just not for power output.   I
>>> have to use an external wattmeter to tuneupand check power output. I
>>> thought it might be just my amp until the other day when I was at a ham
>>> friends of mine, and he told me he had the same problemwith his SB 200.
>>> Anyone else had this problem and know what to do to fix it?
>>>
>>>
>>>
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