Philharmonic UHF band circuit variations - EH Scott Radio Enthusiasts2024-03-29T15:07:29Zhttps://ehscott.ning.com/forum/topics/philharmonic-uhf-band-circuit-variations?commentId=3925821%3AComment%3A46464&feed=yes&xn_auth=noFYI - My pointer dial Philly…tag:ehscott.ning.com,2015-01-12:3925821:Comment:464692015-01-12T17:50:31.093ZDavid C. Polandhttps://ehscott.ning.com/profile/DavidCPoland
<p>FYI - My pointer dial Philly KK-237 has the ground post and the pair of antenna posts only.</p>
<p>Scott - Appreciate your pointing out the early Philly diagram is in my Hobbs book (SECOND expanded edition by Hobbs, published by John Slusser in 2002). I have the commonly seen Riders information as well and the nearly identical Scott Labs Technical Service Data. Both show the curious combination 1939 receiver diagram and the earliest version amp with 83v rectifiers instead of the 5Z3 pair my…</p>
<p>FYI - My pointer dial Philly KK-237 has the ground post and the pair of antenna posts only.</p>
<p>Scott - Appreciate your pointing out the early Philly diagram is in my Hobbs book (SECOND expanded edition by Hobbs, published by John Slusser in 2002). I have the commonly seen Riders information as well and the nearly identical Scott Labs Technical Service Data. Both show the curious combination 1939 receiver diagram and the earliest version amp with 83v rectifiers instead of the 5Z3 pair my pointer Philly has.</p>
<p>Paging through the other diagrams, I note Marvin Hobbs book includes the Quaranta receiver with Scott's earlier version volume expander, and the mid amp diagram. Also Hobbs later book shows the Philly Amp diagram with 5Z3 rectifiers rather than the 83v pair.. Be making some photocopies of the Philly diagrams to work off of. Wonder if Marvin still had his own file of diagrams.</p>
<p>The Philly threads have ramped up my interest further. Guess I will start my own Philly work sooner, and see what I can contribute to these discussions. I acquired mine over 50 years ago as a teenager, and did a partial recap by 1960. Needs a do-over now.</p> Scott,
Much appreciated. Wil…tag:ehscott.ning.com,2015-01-12:3925821:Comment:463022015-01-12T15:50:59.606ZJoe Millerhttps://ehscott.ning.com/profile/JoeMiller
<p>Scott,</p>
<p>Much appreciated. Will come in handy as I'm doing some trouble shooting now in the expander and audio section.</p>
<p>Joe</p>
<p>Scott,</p>
<p>Much appreciated. Will come in handy as I'm doing some trouble shooting now in the expander and audio section.</p>
<p>Joe</p> Yes my sets 7 knob one.You ma…tag:ehscott.ning.com,2015-01-12:3925821:Comment:462612015-01-12T14:54:50.103ZAngelohttps://ehscott.ning.com/profile/Angelo
<p>Yes my sets 7 knob one.You maybe right on the change to 9 knobs! My set has 12/37 on the bottom metal plate, its in pencil...</p>
<p>Yes my sets 7 knob one.You maybe right on the change to 9 knobs! My set has 12/37 on the bottom metal plate, its in pencil...</p> So Angelo, your set is a 7 kn…tag:ehscott.ning.com,2015-01-12:3925821:Comment:463012015-01-12T13:55:27.620ZScott Seickelhttps://ehscott.ning.com/profile/ScottSeickel
<p>So Angelo, your set is a 7 knob set?</p>
<p>I am thinking that the UHF circuit alteration was made when they converted to 9 knob sets- It was one major revision that happened in early 1939.</p>
<p>I have finished the redraw for the 7 knob Philharmonic and I will send you that version at N/C. Angelo, please message me your mailing address again and I will get you the 7 knob schematic. Joe, I will send you the 7 knob version also. It has some notable changes over the later AM Philharmonic,…</p>
<p>So Angelo, your set is a 7 knob set?</p>
<p>I am thinking that the UHF circuit alteration was made when they converted to 9 knob sets- It was one major revision that happened in early 1939.</p>
<p>I have finished the redraw for the 7 knob Philharmonic and I will send you that version at N/C. Angelo, please message me your mailing address again and I will get you the 7 knob schematic. Joe, I will send you the 7 knob version also. It has some notable changes over the later AM Philharmonic, mostly in the UHF and the AGC, but also the audio section. I just need to do a little tweaking and get them printed.</p>
<p></p>
<p>Kent- if you are reading this- when you record the serial numbers, do you also record the information like number of knobs, bands, etc?</p>
<p></p>
<p></p> My BB226 Philharmonic 30 (poi…tag:ehscott.ning.com,2015-01-12:3925821:Comment:463792015-01-12T04:30:34.678ZAngelohttps://ehscott.ning.com/profile/Angelo
<p>My BB226 Philharmonic 30 (pointer dial) does not have the UHF ant post.Scott great job on the redraw schematic.I can now follow every thing easy.Thanks again...</p>
<p>My BB226 Philharmonic 30 (pointer dial) does not have the UHF ant post.Scott great job on the redraw schematic.I can now follow every thing easy.Thanks again...</p> I have scanned the early Phil…tag:ehscott.ning.com,2015-01-11:3925821:Comment:463742015-01-11T20:48:38.916ZScott Seickelhttps://ehscott.ning.com/profile/ScottSeickel
<p>I have scanned the early Philharmonic schematic and put it in PDF format. </p>
<p>If anyone wants a copy, please send me a message with your e-mail and I will get you a copy sent. </p>
<p></p>
<p>Kent- if you want to add this to the Google drive files, let me know where to send the files to. I am not sure if there are any other copies of this early Philharmonic schematic floating around. </p>
<p></p>
<p></p>
<p>I have scanned the early Philharmonic schematic and put it in PDF format. </p>
<p>If anyone wants a copy, please send me a message with your e-mail and I will get you a copy sent. </p>
<p></p>
<p>Kent- if you want to add this to the Google drive files, let me know where to send the files to. I am not sure if there are any other copies of this early Philharmonic schematic floating around. </p>
<p></p>
<p></p> Mine is a 7 knob (not countin…tag:ehscott.ning.com,2015-01-11:3925821:Comment:462602015-01-11T01:16:47.482ZJoe Millerhttps://ehscott.ning.com/profile/JoeMiller
Mine is a 7 knob (not counting the scratch suppressor pullout). It's the pointer dial version.<br />
Joe
Mine is a 7 knob (not counting the scratch suppressor pullout). It's the pointer dial version.<br />
Joe Joe,
I believe that the dial…tag:ehscott.ning.com,2015-01-11:3925821:Comment:464642015-01-11T00:10:06.958ZScott Seickelhttps://ehscott.ning.com/profile/ScottSeickel
<p>Joe,</p>
<p>I believe that the dial went to 80 Mhz before this revision, then it went to 60 after. </p>
<p></p>
<p>I will send you a copy of the early schematic redraw when it is complete, hopefully within a few weeks or so. I am unaware of any other source for this schematic besides this book.</p>
<p></p>
<p>The Marvin Hobbs book I have is from Radio Daze Press. It is titled "EH Scott....The Dean of DX". Not sure if it is still available. I can scan the schematic for you if you would…</p>
<p>Joe,</p>
<p>I believe that the dial went to 80 Mhz before this revision, then it went to 60 after. </p>
<p></p>
<p>I will send you a copy of the early schematic redraw when it is complete, hopefully within a few weeks or so. I am unaware of any other source for this schematic besides this book.</p>
<p></p>
<p>The Marvin Hobbs book I have is from Radio Daze Press. It is titled "EH Scott....The Dean of DX". Not sure if it is still available. I can scan the schematic for you if you would like. It is certainly a book worthy of your library. </p>
<p></p>
<p>Norman and Joe, are both your sets 9 knob beam of light units?</p>
<p></p>
<p></p> Scott,
Your nicely redrawn sc…tag:ehscott.ning.com,2015-01-10:3925821:Comment:461612015-01-10T23:33:12.429ZJoe Millerhttps://ehscott.ning.com/profile/JoeMiller
Scott,<br />
Your nicely redrawn schematic does show the dedicated antenna post for UHF.<br />
My Philly doesn't have one. And the dial indicates "Ultra SW" 25 to 80 mHz.<br />
So I guess I have the older version. S/N KK-54.<br />
Where can I find the "Hobbs book"?<br />
Joe
Scott,<br />
Your nicely redrawn schematic does show the dedicated antenna post for UHF.<br />
My Philly doesn't have one. And the dial indicates "Ultra SW" 25 to 80 mHz.<br />
So I guess I have the older version. S/N KK-54.<br />
Where can I find the "Hobbs book"?<br />
Joe Scott:
Thanks. I was not awa…tag:ehscott.ning.com,2015-01-10:3925821:Comment:462932015-01-10T21:18:29.462ZNorman S Braithwaitehttps://ehscott.ning.com/profile/NormanSBraithwaite
<p>Scott:</p>
<p>Thanks. I was not aware that the schematic in the Hobbs book was the early version that I do not have in my Philharmonic file. The parts chassis is a 9-knob version.</p>
<p>Norman</p>
<p>Scott:</p>
<p>Thanks. I was not aware that the schematic in the Hobbs book was the early version that I do not have in my Philharmonic file. The parts chassis is a 9-knob version.</p>
<p>Norman</p>