¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
Date
Re: SX-110 2nd IF Circuit Design
Correct.? I made a typo when copying the information over. 73 - Steve, KW4H
By KW4H · #24722 ·
Re: Test
Thanks Walt. One less thing to worry about. 73, Gary H. Harmon, Jr. K5JWK 6003 Archwood San Antonio, TX 78239 (210) 657-1549 <mailto:gharmon@...> gharmon@... Grroup and List Moderator
By Gary Harmon · #24721 ·
Re: Test
Hi Gary, it works to my house.. Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters Your past has no control over your future. Only your NOW can impact your future.
By waltcates · #24720 ·
Test
Just testing to see if my access to this group is working. 73, Gary H. Harmon, Jr. K5JWK 6003 Archwood San Antonio, TX 78239 (210) 657-1549 gharmon@... <mailto:gharmon@...> Grroup and
By Gary Harmon · #24719 ·
Re: PS-150 PS voltages
If it is a 2w resistor that is probably why it is open. The bleeder resistors are 15K 10-watt. I replace them with 20K 10-watt resistors, which reduces the heat dissipated in the chassis. It still
By waltcates · #24718 ·
Re: PS-150 PS voltages
30K at 575v is a pretty decent pre-load! About 20ma. That¡¯s 6 watts for each resistor and a total load of 12 watts.
By Bruce Collins · #24717 ·
Re: PS-150 PS voltages
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
By Lionel B · #24716 ·
Re: SX-110 2nd IF Circuit Design
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
By waltcates · #24715 ·
Re: SX-110 2nd IF Circuit Design
I think the 42 vs the 42A have the different front ends Sent from my Verizon 4G LTE Tablet
By Scott Petersen · #24714 ·
Locked Message Delays for Members
*Please Read:* * For new members and existing members who lurk in the background and decide to post for the first time, those postings will not appear immediately and that is by design.* *Posting
Re: SX-110 2nd IF Circuit Design
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@...>
By KW4H · #24712 ·
Re: SX-110 2nd IF Circuit Design
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
By don Root · #24711 ·
Re: SX-110 2nd IF Circuit Design
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
By Richard Knoppow · #24710 ·
Re: SX-110 2nd IF Circuit Design
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
By don Root · #24709 ·
Re: SX-110 2nd IF Circuit Design
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
By Jacques_VE2JFE · #24708 ·
Re: SX-110 2nd IF Circuit Design
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
By don Root · #24707 ·
Re: SX-110 2nd IF Circuit Design
Today I pulled out the big gun ¨C Osterman¡¯s book. Looking at the IF tubes of some of the Hallicrafters (listed in order of IF) ¨C and this is not a comprehensive list ¨C I ¡°think¡± it¡¯s
By KW4H · #24706 ·
Re: SX-110 2nd IF Circuit Design
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
By Richard Knoppow · #24705 ·
Re: SX-110 2nd IF Circuit Design
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
By Richard Knoppow · #24704 ·
Re: SX-110 2nd IF Circuit Design
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
By don Root · #24703 ·