Dave, that tuner appears to be manufactured for the Japanese market and most likely runs on 100 volts AC. Check the information on the back of the tuner. You will need a step up or down transformer

The Sony STA6B is the Japanese FM bandwidth version; check power too; you will need a 110v 50Hz to 120v 60Hz converter. Your stations will be limited to only the lower range of US FM airwaves.

Hi, From your description of the tuning range, it appears that you have a unit that was intended for the Japanese domestic market. If you look at the back the voltage requirements should indicate

Sony fm tuner st a6b is an fm tuner from the 70’s and just got one off ebay……....really nice spec accept for the tuning dial………….the specs state the fm tuning range is normal 89.

First the good news: Another Batteries Plus Bulbs location was able to make up a new one for me. They, like Bob, said the originals are 2/3 AA. Unlike conventional batteries, these NiCads have

Here's more work on this. Group delay measurements enclosed. Mind, you, again, these and not sims, but actual measured values (I assume, for instance, the notches can never go as deep as the sims

Not to say it was the case with this particular individual, but I know of other that as demand increased, this other company started to add staff that was lower cost and less qualified...to setup a

Please remember, all these repair techs are not like a manufacturer's repair center. They are mostly single individuals that, mostly, have been doing this for a long time. It is important that we try

I wanted to start a new thread related to this topic, especially while it is fresh on my mind. Lest I forget... It will get post it here as I can, in sections with pics. Then probably posted on TIC on

Give it a break, and come back to it after a couple days. If your unit might be defective, maybe look at the limit for returns pronto tonto. It would be useful if you filled in the blanks in the

Adding an update and some pictures. I took out the tuner module(broke some things along the way) and removed the shields. The tuner board has a top and bottom, pictures are attached and labeled as

After recalibrating - which I'm about to redo, as I'm not 100% sure of all steps - I'm getting this out of a 150kHz filter (JA). I trust I need to recalibrate or maybe the device is subpar?... I'm

Here is a wider frequency scan showing, for comparison, the response of both the previous Murata 280 (red) and Murata 150 (black). Note, these are better examples of almost perfect looking filters.

I wanted to update this topic with more information. Here's a quick recap of the problem. The tuner, a DA-F20, did not play in stereo, and reception was poor. A quick alignment showed the both

well, it's been a lot of years since i've used joseph chow's services, and i had very good results. 15 years ago, he converted a japan-spec acuphase t109 for me, and upgraded it as well. the work

For comparison, here is the same filter. Blue plot is the standard response. The black lower plot shows the effect of adding a 180 pf C to the output (instead of 10 pf). Insertion loss goes way up

This is a standard Murata 280 kHz filter swept with 404 points (4 segments). The total span is 600 kHz, centered at 10.7 MHz. Group delay is below. I did a right click and adjusted the group delay Y

This is a screen shot from nanosaver showing how to setup a band centered at 10.7 MHz - that you can recall later. Note is is accessed from Display Settings" > "Manage Bands"

Unfortunately, I too have had negative experiences with Mr. Chow's work. A few years ago he sold me a modified Music Hall mmf-25 CD player, supposedly having upgraded parts and enabling it to be used

It still looks slightly off, but better. What filter are you using? It looks like a defective filter from your displays. Can you try another 2 or 3 filters, both 280's and 150's? You should have some