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#121
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Crystal phasing & single signal reception
"gareth" wrote in message
... I wonder if some more experienced and senior (in the literal sense) amateur could explain to me one difficulty that I have in understanding single signal reception with the crystal phasing control? AIUI, the phasing control is adjusted so that the frequency that would give the audio image is phased out by being in the notch. If that is true, how is it then possible to adjust the BFO to a pleasant-for-you tone, because such adjustment will alter the CIO frequency? Surely the BFO has to be set in advance to be halfway between the serial resonant frequency and the notchable parallel resonant frequency? This is a query stimulated by my current project which is to build a boatanchor style RX, with a flywheel-loaded slide rule dial like that of the Eddystone EA12 This subject matter illustrates a saying of Mrs.Nugatory, "For those who know the subject matter, no explanation is necessary, but for those who don't, no explanation is possible". And what a pity that Mrs.Nugatory has not blessed us with her opinion, for I feel sure that she is the one person who would have the answer at her fingertips, resulting from her experiences with the HRO series of receivers. But what I don't understand is the allegation of abuse laid at my door (in many cases by people who used it as an excuse to heap abuse in my direction; particularly the Baying Mob from ura most of whom have joined the thread, not to contribute to it, but merely as a vehicle to express their own infantile habituation) because I have informed those who have gone off at a tangent, but otherwise thanked them for their contributions. How is that abusive? Would it not have been ruder to ignore irrelevant contributions without acknowledging them? But the fact remains that for those who understand the use of a crystal phasing control in pre-1950 receivers that the questions as posed above are as completely informative as is necessary. |
#122
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Crystal phasing & single signal reception
"Jerry Stuckle" wrote in message
... On 8/25/2013 7:09 PM, gareth wrote: "Percy Picacity" wrote in message ... In article , "gareth" wrote: snip You're still missing the point that in addition to the peak response, there is also a deep null. No I'm not! It can be adjusted with the 'phase' control to null a signal *at IF* near to the wanted one. Adjusting the position of the null has no affect on beat frequency with the wanted signal, or the beat frequency of the unwanted signal (it gives the BFO a less strong IF interfering signal to beat with but it does not affect the frequency of the beat note, just the loudness). Tuning the BFO has no effect on the null. The two controls do not interact, though they both have an affect on readability. Straw Man To call you an idiot would be an insult to idiots everywhere. Infantile PLONK! |
#123
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Crystal phasing & single signal reception
"Peter Able" stuck@home wrote in message
o.uk... You asked for input from "experienced and senior" folk and yet you've been rude and dismissive of such input. Why do you act down to Mr. Reay's earlier characterisation of yourself? I'd like to see him proved wrong - but that is a matter entirely in your hands, Gareth. Infantile PLONK! |
#124
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Crystal phasing & single signal reception
On Mon, 26 Aug 2013 20:14:17 +0100, gareth wrote:
Infantile PLONK! Fixed it for you. |
#125
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Crystal phasing & single signal reception
"gareth" wrote in message
... Infantile PLONKER! We know you are. |
#126
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Crystal phasing & single signal reception
In article ,
"gareth" wrote: But the fact remains that for those who understand the use of a crystal phasing control in pre-1950 receivers that the questions as posed above are as completely informative as is necessary. And you have had your answer - the tuning of the BFO has no effect on the phasing control and vice versa. Do you not believe the answer? -- Percy Picacity |
#127
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Crystal phasing & single signal reception
On 26/08/13 18:47, Fred Roberts wrote:
On Mon, 26 Aug 2013 12:59:07 +0000 (UTC), Stephen Thomas Cole wrote: I'm tempted to write to OFCOM and point out this loophole, truth be told. This is a backdoor that needs to be locked shut, quick. Quick Brian! Someone is trying to steal your blue flashing light! ROFL - what a tool.. He'll have to close the HAREC loophole too. I can imagine Ofcom's response to that, but he's probably already got a more polite version from his backscratching supporters. oops... that should be 'backchannel supporters' -- Spike |
#128
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Crystal phasing & single signal reception
On 27/08/13 09:47, Fred Roberts wrote:
On Mon, 26 Aug 2013 23:04:01 +0100, Spike wrote: He'll have to close the HAREC loophole too. I can imagine Ofcom's response to that, but he's probably already got a more polite version from his backscratching supporters. He's drafting the first RFD in Ofcoms history as we speak ;-) oops... that should be 'backchannel supporters' I prefer "backend" or "arse end" myself.. Very approporiate! I see RFD3 has hit the stands, and is generating much apathy. -- Spike |
#129
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Crystal phasing & single signal reception
On 27/08/13 09:50, Spike wrote:
I see RFD3 has hit the stands, and is generating much apathy. This (in part) from Pedt in unnm; "It a nutshell, you are making it 11 votes easier to litter the hierarchy with little or never used groups and you are making it 6 votes easier to forcibly delete a group in the face of opposition from the users of the group. Neither has any benefit to the hierarchy. " Agenda rumbled. -- Spike |
#130
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Crystal phasing & single signal reception
"Percy Picacity" wrote in message
... In article , "gareth" wrote: But the fact remains that for those who understand the use of a crystal phasing control in pre-1950 receivers that the questions as posed above are as completely informative as is necessary. And you have had your answer - the tuning of the BFO has no effect on the phasing control and vice versa. Do you not believe the answer? Stating the bleeding obvious which we all knew any way is about as useful and as relevant as quoting Newton's laws of motion; for neither are an appropriate response to the query as originally put. I refer you page 79 of the previously mentioned book. |
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