[Hallicrafters] R-45/ARR-7 Questions

[Joe Connor]

Just a note on the .0082 mfd bypass caps in this receiver. I pulled one out and it was made by Micramold. Given the lousy reputation of Micramold caps, I plan to replace them with .01 mfd ceramic disks.
 
                            Joe Connor


>________________________________
>From: Joe Connor <joeconnor53 at yahoo.com>
>To: "hallicrafters at mailman.qth.net" <hallicrafters at mailman.qth.net>; "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net> 
>Sent: Saturday, March 24, 2012 10:08 PM
>Subject: R-45/ARR-7 Questions
>
>
>I just picked up a pretty nice R-45/ARR-7 (the airborne SX-28). It came with the PP-32 power supply. Thankfully, a prior owner replaced the power xformer so the set can operate on 60 cycle power. With a little tinkering, the set now works pretty well. 
>
>I have some questions that I hope you can answer:
>
>1. From what I've read, it's a good idea to bypass V-12 (6AB7), the radiation suppression tube. How do I go about bypassing it?
>
>2. Interestingly, most of the bypass caps are .0082 mfd, not .01 mfd. Are these mica caps or paper caps? If they're mica, I'll probably leave them alone. 
>
>3. The audio output (6V6) and 1st audio (6SQ7) each have a 20 mfd bypass cap. I'll be damned if I can find them. Does anyone know where they are located.
>
>4. I know this is probably a needle in the haystack, but might anyone have a front-panel cover for the scanning mechanism?
>
>5. Is there anything else that I should watch out for?
>
>With this set, I got some paperwork that shows how good we have it today with the Internet. The fellow who owned this set in the '60s apparently tried desperately to find a manual for it. I have the letters that Hallicrafters and the ARRL wrote to him politely stating that they couldn't help. Now, we click on Bama and there's a manual on our computer screen. It's pretty amazing, when you step back and think about it.
>
>As always, thank you for your help.
>
>                                        Joe Connor
>
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