Negative peak greater then the Postive

Discussion in 'Amplitude Modulation' started by WA4JK, Jun 6, 2020.

ad: L-HROutlet
ad: l-rl
ad: L-MFJ
ad: Left-3
ad: Subscribe
ad: Left-2
ad: abrind-2
  1. K8ERV

    K8ERV Ham Member QRZ Page

    There you go with them big words------

    TOM K8ERV Montrose Colo
  2. WA4JK

    WA4JK Ham Member QRZ Page

    Still having the issue, yes it certainly could be operator error or maybe not... This ain't my first rodeo, any cowboy can buck off... So can you
  3. N2DTS

    N2DTS Ham Member QRZ Page

    Power supply sag, low grid drive and/or bias, wimpy mod tube, wrong modulator bias, shorted turns in mod transformer, low emission of class c final tube/s.
  4. KA9JLM

    KA9JLM Ham Member QRZ Page

    You don't want to share with others. o_O

    I am not going to share my Beef Jerky with you. :p
  5. WA4JK

    WA4JK Ham Member QRZ Page

    I have new mod tubes in and no sag in the power trany. I measured the bias and it’s good. It most likely the audio string run by the duffas behind the key.
    I’ve adjusted everything to where the negative does not hit 100% and reports from the audience is it’s sounds good and that’s good enough for me.
    As to why the negative is larger than the positive at times at certain voice peaks? It might be the bc610 mod Iron limits or something I’m going to have to study about. Until then it works good enough to not bother others.
    No soup for you
  6. AC0OB

    AC0OB Platinum Subscriber Platinum Subscriber QRZ Page

    Negative peak greater th[a]n the Positive [peak]

    What is your baseline level for, and how are you measuring your waveforms?

    Last edited: Jun 10, 2020
  7. N2DTS

    N2DTS Ham Member QRZ Page

    Just because the modulator tubes are new does not mean one has more output then the other.
    I try and put the better tube in the positive side.

Share This Page