Re: [Elecraft] Fwd: Where is the 1500 KHz. HPF in the K3/K3s

[Michael Blake via Elecraft]

Correction - "1.8MHz HPF"

73 - Mike - K9JRI
 

> On Mar 14, 2019, at 10:12 AM, Michael Blake via Elecraft 
>  wrote:
> 
> 
> Can anyone provide me with the location of the 160M HPF on the K3s schematic? 
>  On the KX3 schematic it is clearly labeled “1.8 KHz. HPF” but I have been 
> unable to find the similar circuit on the K3s schematic.
> 
> Since you must use the RX  IN connector to receive on 630M it is obviously in 
> the circuit but I cannot find it on the drawings.
> 
> Any help?
> 
> 73 - Mike - K9JRI
> 
> 
> 
> 
> 
>> Begin forwarded message:
>> 
>> From: Michael Blake via Elecraft 
>> Subject: [Elecraft] Where is the 1500 KHz. HPF in the K3/K3s
>> Date: March 10, 2019 at 9:38:49 AM EDT
>> To: Elecraft Mailing List 
>> Reply-To: Michael Blake 
>> 
>> I understand that a BCB HPF is necessary to protect the PIN diode switches 
>> from BCB (Broadcast Band) overload but I can not find it in the K3s 
>> schematics.  Can anyone tell me which sheet and components make up this 
>> filter.
>> 
>> I understand that to receive 630M you bypass the HP filter by using the RX 
>> IN but I am curious where it is on the schematic.
>> 
>> Michael Blake
>> k9...@mac.com 
>> 
>> 
>> 
>> 
>> 
>> 
>> __
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> 
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[Elecraft] Fwd: Where is the 1500 KHz. HPF in the K3/K3s

[Michael Blake via Elecraft]

Can anyone provide me with the location of the 160M HPF on the K3s schematic?  
On the KX3 schematic it is clearly labeled “1.8 KHz. HPF” but I have been 
unable to find the similar circuit on the K3s schematic.

Since you must use the RX  IN connector to receive on 630M it is obviously in 
the circuit but I cannot find it on the drawings.

Any help?

73 - Mike - K9JRI





> Begin forwarded message:
> 
> From: Michael Blake via Elecraft 
> Subject: [Elecraft] Where is the 1500 KHz. HPF in the K3/K3s
> Date: March 10, 2019 at 9:38:49 AM EDT
> To: Elecraft Mailing List 
> Reply-To: Michael Blake 
> 
> I understand that a BCB HPF is necessary to protect the PIN diode switches 
> from BCB (Broadcast Band) overload but I can not find it in the K3s 
> schematics.  Can anyone tell me which sheet and components make up this 
> filter.
> 
> I understand that to receive 630M you bypass the HP filter by using the RX IN 
> but I am curious where it is on the schematic.
> 
> Michael Blake
> k9...@mac.com 
> 
> 
> 
> 
> 
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

__
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