Stephen Scheel's Page

"While you are at this point, do continuity tests on the speaker -  The B+ field which has a tap about midpoint. And the output transformer. the voice coil impedence is 38 ohm (about 32 ohms on a VTVM.) The Philly speakers seem pretty rugged and…"

"Thanks Alex.    I want to give it a visual inspection first which in my case requires physical test environment setup first. I'd rather wait a while so i don't have to lug the big chassis around too much to keep the risk to it to…"

"At least plug the tuner chassis into the amp and test it to see if it works.  It may work great, marginally, or not at all.  You'll probably hurt nothing if you try it for a short time.  It would be best to monitor the current…"

"ok.. i guess i'll not temp fate.  this will probably be the last post for a while.   Now that the supply is done i need to get onto another project for the local club before I start on the Receiver.   THanks for all of…"

"Steve - Do NOT power the amp without a tuner attached. If you do, the B+ voltages will rise extremely high without the load of the tuner. The filter caps will break down and you'll have a very big mess on your hands. Scott explicitly warns…"

"Hi folks, I’ve recapped the PS/amp and given the rest of the components a general once-over. Everything looks to be in order. I’d like to fire the amp up connected to the speaker, feed it an audio signal, and put it through its paces…"

"Paper Caps :)"

"caps, not papers. I gotta watch spell check more carefully !!"

"David, Good Idea.. I'm thinking a index card under the chassis when installed.      I'll definetely check to see if the papers have been restuffed.  The reciever is still setting in the cabinet for…"

"I've never had any noise introduced by the jack on the amp, I also never use them. For originality, I would leave it in circuit, it hurts nothing. Kent"

"it is helpful for benefit of future owner to use a Sharpie or some other way to indicate on an inside surface the extent of restoration and a date. A folder of set history is too easily separated from the radio, so is insufficient. Restuffing the…"

"75!.. holy smokes.. Two wishes from the Antique radio gods....  1.  Whomever recapped the powersupply/amp also recapped the Reciever. 2.  They did a better job than they did on the on the PS/Amp (not likely) :) Steve"

"I've only electronically restored one Philharmonic, a very early pointer dial set. That was 25 years ago.  But, I still remember I replaced 75 paper and electrolytic capacitors.  It's quite labor intensive, but the end result is…"

"Once i got all the old main electrolytic caps out .. it would appear they have been taken apart, re-stuffed and then epoxied back together.    Seems C73 was replaced sometime on or after 2004 as it had a Nichicon cap in the circuit with…"

"Thank you David, I'm going to keep an eye out to see if i can find a set that match the amp in the Philharmonic picture..  If not these may just get polished up and go back on the chassis until i can find some.   Scott, THanks…"

"I am late to this party as usual.... The 4/4/39 dated schematic IS the one to use.  There is a scratch suppressor switch on both AM variations.  There are errors in all the schematics.   Here are the changes from the 7 knob set…"