[ARC5] R-23/ARC-5

[AKLDGUY]

So I take it that's a half-apology for wrongly casting doubt on what I
wrote? The Occam's Razor comment still implies that I'm wrong. Why can't
you admit you misinterpreted my post?

Neil ZL1ANM


On Saturday, March 2, 2019, Mike Morrow <kk5f at earthlink.net> wrote:

> Extraordinarily unlikely, but an entertaining notion...I guess.
>
> Have you heard of Occam's Razor?  :-)
>
> Mike / KK5F
>
> -----Original Message-----
> From: AKLDGUY
> Sent: Mar 1, 2019 2:04 PM
> To: Mike Morrow , ARC-5 List
> Subject: Re: [ARC5] R-23/ARC-5
>
> If that's meant to be a criticism of what I wrote, please look at the R-23
> circuit diagram and re-read what I wrote. Where do you get the notion that
> the resistor is across the 12K8 supply? It's now in series with the 12SK7
> heater across the 12V line, making it likely that a 6SK7 was fitted.
>
> Neil ZL1ANM
>
>
> On Saturday, March 2, 2019, Mike Morrow <kk5f at earthlink.net> wrote:
>
>> If the filaments have been rewired to be parallel instead of the original
>> two-in-series configuration, it makes absolutely no sense to have added a
>> resistor across the 12K8 filament supply.
>>
>> Mike / KK5F
>>
>> -----Original Message-----
>> From: AKLDGUY
>> Sent: Mar 1, 2019 12:16 PM
>> To: "kg4kgl at gmail.com" , ARC-5 List
>> Subject: Re: [ARC5] R-23/ARC-5
>>
>> Re: the resistor fitted between pin 7 of the 12K8 and pin 7 of the 12SK7.
>> It's most likely that the heater circuit has been rewired for 12 volts with
>> pin 2 of the 12K8 now grounded. Pin 7 of the 12SK7 has been disconnected
>> from that pin and connected via the resistor to the 12V line at the 12K8's
>> pin 7. The most likely reason for doing this is that someone fitted a 6SK7
>> instead of the 12SK7. Pull all the tubes and identify them, then check that
>> the heater wiring is correct for that configuration. 12SK7s aren't hard to
>> find.
>>
>> Neil ZL1ANM
>>
>>
>> On Friday, March 1, 2019, kg4kgl at gmail.com <kg4kgl at gmail.com> wrote:
>>
>>>
>>> Good afternoon,
>>>
>>> I recently bought a somewhat hacked on R-23. My goal is to get it
>>> working as a Q5’er with a 12SA7 pentagrid converter frontend for 80 and
>>> 40m. I also want to keep it looking as original as possible.
>>>
>>> I have schematic diagram in front if me and there is a part that
>>> installed that is not on the diagram. It looks like a ceramic wire wound
>>> resistor (grey in color) with USN markings. It is connected between pin7 of
>>> the 12k8 and the 12sk7 pin7 next to it. Is this a factory part?
>>>
>>>
>>> Another question. The inside of the top access cover has a small dial on
>>> it and an adapter for the front tuning mechanism. What is the dial for?
>>>
>>
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