Home |
Search |
Today's Posts |
#3
![]() |
|||
|
|||
![]()
Were you trying to run a net with a BC348 as your primary receiver??
The I.F. is as wide as a gorge! When the band is hot I could never use 348 without the 'Q5er.' "Bill M" wrote in message ... David Stinson wrote: The big scare on Friday night was the unmistakable smell of roasted resistor coming from the BC-348-R, which then crashed, stone dead. I brought plenty of spares parts and started "resuscitation" right away. This receiver had been running flawlessly for a month (as had the transmitter), but now *three* paper bypass caps failed, leaking to short. This toasted two dropping resistors, failing them *low-Z*. One 4.7 K-ohm was down to 200 ohms. The real scare was that these were in the IF plate leads, right through the hair-fine wire in the IF transformer windings. The way the receiver suddenly died, I was sure one of the IFs had gone open, but there must have been an angel watching over us, because new caps and resistors plus re-alignment brought it back from the dead. On the antique radio forums we make a point of driving home "replace those go***mn paper caps because they are never good". You've been around, Dave, You should know better! Since this post is only to the BA forum instead of cross-posting to rar+p I can admit that the only old radio out of dozens that I have not been compelled to wholesale recap has been an English Barker 88 which used surplus (at the time) metal cased US war-surplus caps. They all, 100%, passed any test I could give them. More often it makes sense to yank the old paper jobbies and place giant Orange Globs (for the non-restuffers) ...or in your case, assume they were ok with the resulting consequence. FB on the expedition's results.. -Bill WX4A |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Special Events Station, WWII Equipment, April 15-17th | Boatanchors | |||
Operation with Expired License | Policy | |||
FCC: Broadband Power Line Systems | Policy | |||
FCC Amateur Radio Enforcement Letters for the Period Ending May 1, 2004 | General | |||
New Truck driver & CB | CB |