[ARC5] R-27 alignment

[Robert Downs]

The preset table for all five receivers will be found on page 45 of all revisions of 16-30ARC5-2 dated between 23 February 1944 and 15 August 1950.  It will be found on page 39 of the revision dated 15 December 1954.

 

Robert Downs - Houston

WA5CAB

 

From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Brian
Sent: Saturday, February 17, 2018 00:46 AM
To: John Saxon; ARC-5 List; ARC-5
Subject: Re: [ARC5] R-27 alignment

 

Hello John

 

My alignment manual is likewise silent on the settings. However from other ACR-5 / SCR-274-N documents, for the R-27, C4F needs to be half meshed and C4G needs to be fully meshed.

 

In my experience, if those trimmers are not in the correct positions, tracking and frequency range suffer.

 

73 de Brian, VK2GCE.

 

On Saturday, February 17, 2018 11:11 AM, John said:

 

I just went through an alignment for my R-27, went well.

 

But I do have a question.  In the manual we find the following:

 

"Before beginning alignment, check the positions of C4F and C4G

and adjust them if necessary to the position shown in the table which follows."

 

A table follows, but positions for C4F and C4G are not given.

 

Do I do anything to them?

 

Thanks,

John

K5ENQ

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