"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by RDPipes, May 12, 2023, 07:50:33 AM
Quote from: AL_as_needed on May 13, 2023, 09:27:57 AMAnd what good sir was the information offered by said kindly gentleman?
Quote from: RDPipes on May 12, 2023, 07:50:33 AM[W]hat in tarnation is that component sitting a top the condenser?
Quote from: poplar1 on May 13, 2023, 10:14:06 PMMany 306s were converted to "302 Specials" by removing the tube and adding the cylindrical 1.0 uF capacitor shown in the photo. (It uses the same bracket as the tube.)The original 306 had only the talking condenser (red to C and black to BK on dial) since with the tube, no ringing condenser is used.The B3A is a low impedance ringer that requires a 1.0 uF condenser rather than the 0.5 uF used with a B1A or B1AL ringer in a standard 302.
Quote from: RDPipes on May 14, 2023, 05:55:56 AM... I couldn't understand why they just didn't swap a 4 wire condenser for the 2 wire but, evidently time and money was behind doing it this way as I was also told...
Quote from: poplar1 on May 14, 2023, 06:42:56 AMThe KS- part number on the cylindrical condenser indicates that it was sourced from an outside manufacturer. So it likely cost more than a new 195A condenser (or a used 195A from a 302, 304, 354, 44x, 46x, etc.). And replacing the 2-wire 195C in the 306 with a 4-wire 195A would take about the same amount of time.However, you need a 1.0 uF condenser for the B3A ringer. I am unaware of a 195-type condenser with 2.0 uF talking condenser + a 1.0 uF ringing condenser.In a 534A to 634A, 634A to 634BA, or 534A to 634BA conversion, you also have to add or replace condensers. The 534A had a single condenser for both talking and ringing, but the 634A requires two. The 634BA, if with a 302-style B1A ringer needs a 0.5 uF ringing condenser. However, while a 195A from a 302 could have been used in a 634BA conversion, I don't recall seeing 634BAs with 195A, unless it was cobbled by a later owner (not in the W.E repair shop)...I don't know why.
Quote from: poplar1 on May 15, 2023, 12:21:22 PMIt depends on what you are trying to do. If I were reselling it to a non-collector, I would either add a 1.0 uF capacitor -- which is specified for a B3A or other low impedance ringer since World War I --or add a 0.5 uF or 0.47 uF in parallel with the 0.5 uF (yellow and slate) in a 195A condenser from a 302. For my collection, I would keep one original 306, as furnished with tube + one "conversion" done in the WE repair shop -- with the KS- 1.0 uF condenser that replaced the tube.