Sansui AU-505 and SPICE model


I've begun building a SPICE model of the Sansui amplifier. This will aid in troubleshooting the circuitry.

This is the initial stage of development. I focus on the output stages and ignore unrelated elements such as phono input circuitry.


Comments

Post a Comment

Popular posts from this blog

More software development

 I continue to develop the script that processes incoming movies. The script began as several separate scripts performing specific tasks. I combined them into a single bash script. Recently, I took up the task of local database development again. I have a lical version of the IMDB database in Sqlite format. A series of csv files comprise a local OMDB database. They can be imported into an Sqlite database as well. I downloaded what seems a reliable and accurate Kaggle version of the TMDB database to complete the set. I need to determine the metadata I will use and the source, then develop a script tobextract the data and import into movie files. This will rliminate the need for MetaX, though that app has many desirable features. One of the features fetches poster images for perusal and selection. That I can do but time and a list of sources will be needed. Until then I will continue to use MetaX. I do not intend to replace the program 'Rename My TV Series.'
Read more

February 2025 update - "moving the furniture"

 Rearranged the 'furniture.' Up to now, I've been using a lot of power strips to accommodate all the electrical plugins I have. Some at the rear wall for the power and Movie hdd bank. The HDDs were moved up to the TV. I removed the hdd shelf on the back wall and relocated the shelf just below the TV, accessible but not intrusive.I removed the two pieces of clapboard and replaced them with the plywood sheet that was holding the turntable over the AVR. The turntable has been removed to the top of the right Altec speaker cabinet. A center speaker module sits on top of the AVR. A blueray player sits on top of the left Altec cabinet. The three 3.5" sata drives and the 2.5" drives ,and their hub ,are now on the shelf.  I updated the Plex and Jellyfin software. The Senhneiser WiFi headphones are working but I removed the circuit board when the unit became intermittent and finally seemed to die. Removed from the plastic housing, the unit works acceptably, though the plugi...
Read more

Hearing loss and equalizers

  There is now a set of USB powered speakers for watching movies on my laptop.   Until my power station is up to par, I occasionally watch movies, television on my laptop's 1080p screen. The audio has, unfortunately, not been adequate.   The VLC player has a feature that allows cranking the volume up to 200%. That helps.   I recently replaced my decaying Sennheiser headphones with a new-old Sennheiser RS 65 wireless headphone set. The plastic in the wire of the old set had dried out, become brittle, and was cracking every couple of inches.   The new phones are nice but suffer from inadequate audio. Useable but could be better.   Previously, I had connected an Alesis me-230 stereo equalizer to the audio network in my entertainment system. This allowed me to watch movies on the big screen with audio that had been adjusted to compensate for my hearing loss.   The headphones came with a transmitter-charger. The transmitter has a phono cable to plug into th...
Read more