rodman99999
Responses from rodman99999
| 6922 tube I didn’t mention the two ARC preamps (SP-9 and SP-14), I owned before the BAT CDP. Both of which also displayed remarkable differences in presentation, with various 6DJ8/6922/E88CC iterations. Didn’t matter where the tubes where manufa... | |
| ... Should I be concerned? @ insearchofprat - Installing a pair of 12AU7 tubes, should result in (around) 1/5th the gain of the 12AX7 and correct levels to your power amp. Be certain the tubes are tested and rated as, "Low Noise". | |
| 6922 tube "care to elaborate on how you tell a Tele from a Amperex?? please?" EASY; the Amperex (early Sixties, Navy 6922) was a little warmer than the long-plate Tele, in the mids. Compared ... | |
| 6922 tube I purchased my BAT VK-D5 in the early Nineties. It takes six 6922 family tubes. Tried a wide variety of the best I could find (Amperex, Teles, etc) and could even tell the differences between the earlier years of the Siemens CCa. Es... | |
| ... Should I be concerned? Here’s a thread that mentions the Wolze as using two 12AU7s: https://www.audioshark.org/pre-amps-9/wolze-triode-line-level-preamp-4421.html Dave Wolze actually replied to the post and didn’t dispute the mentioned tube compliment. ... | |
| ... Should I be concerned? btw: What do you have to lose, by trying your Morrison? I used to own a Placette Passive Volume Control. Unfortunately; the rest of my system, at the time, didn't have enough gain, for the SPLs I enjoy, with many of my CDs and vinyls. ... | |
| ... Should I be concerned? Q) "Would it play if it was setup for 12AU7s with AX7s in it?" A) Yes, it easily could. As mentioned; those two tubes are usually interchangeable. ".... someone seemed to have a reference / familiarity to the preamp, and told me... | |
| adjustable "fixed" bias amps Happy listening! | |
| ... Should I be concerned? ".....would switching to a 12AU7 instead of the 12AX7 make a diff?" Yes; in most cases, the 12AX7, 12AT7 and 12AU7 are interchangeable (gain factors of 100, 60 and 17 to 20, respectively). That could actually be your best bet, but- check... | |
| adjustable "fixed" bias amps If your amp is push-pull, there must be two 300b tubes per channel (at least). If those two 300b tubes share the same bias adjustment, they’re splitting the measured current (ie: 50-60mA each). | |
| ... Should I be concerned? A suggestion: Turn the Parasound’s level controls all the way down and your preamp’s volume knob to where you want it, at what you desire as your highest/max position. If you can choose, do this procedure in Mono mode. Play what you kn... | |
| ... Should I be concerned? No, you should not be concerned. You can either download or read the owner’s manual from Parasound, here: https://parasound.com/pdfs/vintage/hca750_1000om.pdf You’ll find instructions, under Level Controls, on page 7. Here’s a more ... | |
| Signal to Noise Ratio and Amplifier Distortion Typically; you don't know what you've got, 'til it's gone, regarding noise. | |
| Signal to Noise Ratio and Amplifier Distortion NOTE: Much better to use the search feature, in the top left of that first mentioned site. | |
| Signal to Noise Ratio and Amplifier Distortion Here’s a site that should help you find your answers/definitions: http://www.digitizationguidelines.gov/results.php?gltext=Distortion&x=0&y=0 Just search for the likes of IMD, THD, SNR, etc (gotta spell them out, with caps, or search... |