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Re: Hallaicrafters S38C
¿ªÔÆÌåÓýYes, they are called Bristol screws/nuts and they are available in various places including Ebay.? I got my set from Ebay.? They are not very common from other sources.? Both Hallicrafters and Collins used these screws for their knobs.? Search Ebay under Hallicrafters or Collins and you will probably find them. ? K2WH ? From: HallicraftersRadios@... [mailto:HallicraftersRadios@...] On Behalf Of Wayne Light
Sent: Friday, June 03, 2005 9:47 PM To: HallicraftersRadios@... Subject: Re: [HallicraftersRadios] Hallaicrafters S38C ? Hello Stan...I'm sure that by now you must have received a number of responses...but just in case, The hallicrafters company, for some reason, used an unusual type of nut called a Bristol (I think that is how it is spelled). You will need to find a set of Bristol drivers (I see them on ebay all the time). ? Good Luck Wayne
K7NCE
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SX-17 Meter Damage
To all those who have provided leads for meter repair, I thank you. I am
following up on those leads. To the others who posted and were probably shaking their respective heads in disbelief that I was working on the SX-17 while powered up, I have this to say. First, if you are not familiar with the SX-17 chassis layout, other than the "S" meter terminals, there are no other live terminals or exposed wiring when working from the top of the chassis. So, I felt I was perfectly safe with what I was doing. I also had the mind set that I am working on a tough boat anchor with no real possibility of damaging anything. I mean after all, this thing weighs about 50 lbs. This I admit proved to be wrong. The one item that could be damaged was. Murphy is involved here. Second, the steel cover that goes over the main tuning capacitor must be removed to perform alignment and calibration. It allows access to the trimmer pads. In order to check the effect of the alignment with the cover on vs the cover off, I needed to have the receiver on and warm to avoid initial drift from cold start. So, the rest is history. The end of the shield cover hit the meter terminal and probably opened the coil. This "S" meter is in the plate circuit of the meter tube. So, basically, I shorted B+ to ground through the meter. Live and learn, but I will repair this receiver, count on it. Bill K2WH |
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SX-17 Receiver, I'm Heart Broken.
¿ªÔÆÌåÓýWell just as I was buttoning up my SX-17, new looking, aligned perfectly, tuned up and receiving fabulously, I accidentally touched the "S" meter terminal with the metal cover over the main tuning cap. ? I BLEW OUT THE METER!!!!!!!!!!!!!!!? Can you hear me sobbing here as I write this? ? Anyway, I am looking for a replacement meter.? It looks like the SX-16, SX-17 and SX-18 had the same meter.? Anyone got one?? Contact me off list at K2WH@.... ?The members of this list, as Hallicrafters enthusiasts, you really don't want to see this wonderful almost NEW IN THE BOX receiver have this gapping hole in the front panel.? Do you?? I didn't think so.? So, sell me a meter. ? Thanks for listening.? Now I will go drown my sorrows.
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Electronic Supplier Bookmark
I have added my bookmark for Electronic Suppliers that can supply just
about everything you would need to restore and old radio. Just click on the bookmark and a list will come up. It is my exact list from my computer that I have used in my restoration efforts. Bill K2WH |
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RG-62 Coax
I think someone asked me where I got the RG-62 coax for the SX-117
jumpers well this is where I got it: K2WH |
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Re: SX-117 Video in Files Section
It's in the "Files" section.
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K2WH --- In HallicraftersRadios@..., w4awm@a... wrote:
where did you upload it to? |
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SX-117 vs SX-17
BTW, I am not dropping a number in my "On Base and Warming Up" line
saying a video will be upcoming for the SX-17. It will be the SX-17. The one just uploaded is the SX-117. K2WH |
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SX-117 Video in Files Section
I just uploaded a short grainy video of my almost complete SX-117.
Take a look at it if you feel like it. I'll leave it there for a little while. K2WH |
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SX-117 "S" Meter Circuit and Changing "S" Meter Indications with Selectivity
¿ªÔÆÌåÓýThe continuing story of the SX-117 "S" meter, and how it changes with different selectivity settings.? This is why it changes. ? I measured the AVC voltage on tube V7, pin # 1.? The following are my findings with an "S5" received signal: ? Selectivity Control???????? AVC Voltage on Pin # 1 ? 5 khz??????????????????????? - 0.84 vdc 2.5 khz????????????????????? - 1.09 vdc 5.0 khz????????????????????? - 1.37 vdc ? V7 is a 6DC6 tube and is used as a 1650 khz amplifier of which the "S" meter is in the cathode circuit. ? Tube V10b, is the 6BN8 tube or AVC rectifier which is connected directly to the selectivity switch. ?The selectivity switch switches in (2) different resistive values including (2) different capacitor values in the 2nd IF circuit.? These (2) added components to the 2nd IF circuit, provide the 2.5 and .5 receiver bandwidths. ? The resistive values are also connected to the 6BN8 AVC rectifier cathode circuit and the 2nd IF, thereby loading or unloading the AVC line which explains the varying "S" meter readings when the selectivity Control is changed.? I hope I got that right. ? K2WH ? ? |
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WW2LST Recording
I have uploaded a recording of the LST boat with the call WW2LST in
the "Files" section. It was received on a Hallicrafter SX-111. The boat was off the coast of Georgia about 150 miles out to sea. The recording is 5mb long so if you do not have broadband, it may take a while to upload. I will leave the file for a while on the site. K2WH |
Bill (Group Owner)