Thank you gentlemen for your replies: insightful and informative.
First, as promised, there are some photos. below. You can see the additional 6SN7 that is next to the rectifier and another shows its wiring beneath chassis. You can also see the replacement mains transformer. In another photo. is seen a white B9A valve base below the chassis. This is another mod.: it is a stabilizer valve for the L.O. ~ and is simply hung in the wiring. All these photos show the general state of things below chassis. As you can see, accessibility is not that easy: it's a deep chassis and with tag-boards that may require removal in order to replace components situated thereupon.
Second: my responses to each of you.
Mike: the wiring is not as bad as some I have seen and certainly not totally destroyed - as you found in your R1155. It was many years ago when I last owned a R1155 and a CR.100, but I do recall that accessibility below and above chassis in the CR.100 is somewhat better that the R.1155. I like the idea of disconnecting HT+ from all stages except the one undergoing repair / rebuild. I think that a preliminary replacement of all HT+ wiring that is only from the 'PSU O/P point' would be a sensible initial step; I will need to identify that wiring first, anyway, for a stage-by-stage repair / overhaul approach.
Quote, Michael R:
I am making slow process with the R1155 and am at the stage where I am thinking "What have I let my self in for
"
My response:
Indeed, Mike, indeed. I too have trodden that path. With jobs like this, there is a Rubicon to cross: having bridged it, there is no return: it's a very critical decision. Hence this very Thread of mine.
Andy: silicon rubber-covered wiring; sounds good: I will look into it.
Alan: I will contact Phil via P.M. on this. And you're right about the AR88, however from my viewpoint, you are correct for the simple reason that I don't have the space in the shack / workshop to house both, let alone have two receivers undergoing renovation / repair at the same time. :omg: (You've seen my 'facilities', so you know what I mean!) Plus the temperature at this time of year does limit workshop activities
So to conclude. My response (as per to Mike above) has now determined which way to go about this. However, any further comments will be welcome.
[attachment=3323][attachment=3324][attachment=3325][attachment=3326][attachment=3327][attachment=3328]
Al. / Nov. 21, 2011 //
First, as promised, there are some photos. below. You can see the additional 6SN7 that is next to the rectifier and another shows its wiring beneath chassis. You can also see the replacement mains transformer. In another photo. is seen a white B9A valve base below the chassis. This is another mod.: it is a stabilizer valve for the L.O. ~ and is simply hung in the wiring. All these photos show the general state of things below chassis. As you can see, accessibility is not that easy: it's a deep chassis and with tag-boards that may require removal in order to replace components situated thereupon.
Second: my responses to each of you.
Mike: the wiring is not as bad as some I have seen and certainly not totally destroyed - as you found in your R1155. It was many years ago when I last owned a R1155 and a CR.100, but I do recall that accessibility below and above chassis in the CR.100 is somewhat better that the R.1155. I like the idea of disconnecting HT+ from all stages except the one undergoing repair / rebuild. I think that a preliminary replacement of all HT+ wiring that is only from the 'PSU O/P point' would be a sensible initial step; I will need to identify that wiring first, anyway, for a stage-by-stage repair / overhaul approach.
Quote, Michael R:
I am making slow process with the R1155 and am at the stage where I am thinking "What have I let my self in for
"My response:
Indeed, Mike, indeed. I too have trodden that path. With jobs like this, there is a Rubicon to cross: having bridged it, there is no return: it's a very critical decision. Hence this very Thread of mine.
Andy: silicon rubber-covered wiring; sounds good: I will look into it.
Alan: I will contact Phil via P.M. on this. And you're right about the AR88, however from my viewpoint, you are correct for the simple reason that I don't have the space in the shack / workshop to house both, let alone have two receivers undergoing renovation / repair at the same time. :omg: (You've seen my 'facilities', so you know what I mean!) Plus the temperature at this time of year does limit workshop activities
So to conclude. My response (as per to Mike above) has now determined which way to go about this. However, any further comments will be welcome.
[attachment=3323][attachment=3324][attachment=3325][attachment=3326][attachment=3327][attachment=3328]
Al. / Nov. 21, 2011 //
