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All great information and thank you. I have found that R201 one of two wirewound 15k 2W bleeder resistors is open. R202 is good at 14.7k.? I wouldn't have thought an open bleeder could result in high

The hallicrafters manual in my hand says SX-110 first IF = 6SG7 and the second IF = 6SK7 Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters Your past has no control over your future. Only your NOW

I think the 42 vs the 42A have the different front ends Sent from my Verizon 4G LTE Tablet

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Whoops! My bad - that was a typo. It’s a 6SG7 for the 1st IF, and 6SK7 for the 2nd IF in the SX-110. From: <[email protected]> on behalf of don Root <drootofallevil@...>

Steve, good work on all this! I think you originally said “a 6SK7 was used for the 2nd IF, while a 6SG7 is used for the 1st IF.” == 6SG7 then 6SK7 But now you show from Osterman …. SX-110

The pdf suggests that the change was to affect the AVC. Could be.? The 6SK7 has minimum bias of about 3 volts and cut off bias of around 50 volts,? the 6SG7 range is from 1 volt to about 20 volts so

Richard , Jacques, Steve too and gang What was REALLY in the CSR-5 would consume a few topics according see: http://www.jproc.ca/marconi/csr5a.html As to the comments 1853 and the sx-28 that is two

Hi Richard, For the order of the CSR-5A RF tubes, absolutely not. Makes no sense (intuitively) to me also, but that’s how it was done. It is a fairly rare receiver compared to the other ones made in

Richard getting off topic a bit but you raise the question of coil losses: are these due to the /any coil form material and its dielectric loss or a mixture of that and coil stranding, coil wire

Today I pulled out the big gun – Osterman’s book. Looking at the IF tubes of some of the Hallicrafters (listed in order of IF) – and this is not a comprehensive list – I “think” it’s

I have not looked at the CSR 5 handbook but suspect you have the order of the RF reversed.?The other tubes , like the 1853, are really not like the 6SG7.? They were designed for wide band television

The AR 88 was designed to be a very advanced performance general purpose receiver.? They were never sold commercially?The tubed were the most advanced available at the time . They are very

Steve, Jacques, Richard + i somehow found this link where you can go down to “usages” of the 6SG7 and click and find some interesting but uncertain information it shows Sg7’s but sometimes

everything you ever wanted to know about 150/500 PS. POWER SUPPLIES | WD0GOF<https://wd0gof.com/hallicrafters-radio/technical-discussions/power-supplies/>

Seems reasonable for no load condition. Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters Your past has no control over your future. Only your NOW can impact your future.

I should also add (after my HT45 Loudenboomer power supply experience) that if you do not have a load on a choke input power supply, the voltage can measure pretty high. -- 73/Rick WA6III

Howdy, You might consider putting a variac on it and loading both the high and low voltage B+ to see where they are.? I have found that modern line voltages do increase the output voltages a bit. --

RICHARD , GOOD SLEUTHING!; looks like you found the 6SG6 used very early; and to find 5 of them in one radio. I wonder if they were developed by RCA, well they must have been. The original question

About the 6SG7… Another receiver from the same Era than the RCA AR 88 is the Canadian Marconi Co. CSR-5A. 1st RF: 6SK7, 2nd RF: 6SG7, 1st IF: 6SG7, 2nd IF: 6SK7. The CSR-5A is also the first