[ARC5] Brian's deaf set. Has a 12SK7.

[Bill Cromwell]

Hi,

The question about the tuning is still going begging. If you haven't 
looked at the tuning caps you do not know if the tuning peak is achieved 
at the limit of the cap's range. It may be this is okay but what if it 
would peak higher except there is no further adjustment available from 
the cap. If the cap is at maximum position further adjustment makes the 
detector voltage recede again - just like normal, 'good' tuning. The 
same applies to the minimum position. The cap is good but the tuned 
circuit overall is not.

The devil is always in the details.

good luck and 73,

Bill  KU8H

On 09/28/2016 05:04 AM, Brian wrote:
> Hello folks,
> I am most grateful for all the suggestions you have been putting forth.
> As Les has divined, I am rather busy at present - so I can't do much 
> till the weekend.
> Some clarification seems to be required. This is a bog-standard 
> BC-454-B. All the tubes are warm. All the base Voltages are what I 
> would expect. I did feed signals to pin 4 of the IF amplifier tubes, 
> 12SK7s.
> As all the IFTs peak up, then the trimmer caps are OK, as I suspect 
> are the coils in the IFTs. I have yet to remove the cover over the 
> variable tuning capacitor. But as the padders and trimmers there all 
> have the required effect, I don't think the problem is there.
> I hope to do some serious signal injection - but over the weekend.
> In the meantime, keep your suggestions flowing.
> 73 de Brian, VK2GCE.
>
> On Wednesday, September 28, 2016 9:51 AM , you said:
>
> Hello All
> I had an (off-group) reply from Brian a few days ago.
> I intended ringing him; but it seems (from what he said privately) -
> he's up to his ears with work and other private matters at the moment.
>  Sometimes life gets so busy that radio drops into the background.
>
>  73 de Les Smith
>   vk2bcu at operamail.com
>
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-- 
bark less - wag more