Announcement

Collapse

Forum rules and expectations

Hello, and welcome to the forums at the Nautilus Drydocks, formerly Sub-driver.com!

We welcome anyone with a passion for submarines and a desire to learn and share knowledge about this fascinating hobby. Use of these forums indicates your intention to abide by our code of conduct:


1. No spam. All automated messages, advertisements, and links to competitor websites will be deleted immediately.

2. Please post in relevant sub-forums only. Messages posted in the wrong topic area will be removed and placed in the correct sub-forum by moderators.

3. Respect other users. No flaming or abusing fellow forum members. Users who continue to post inflammatory, abusive comments will be deleted from the forum after or without a warning.

4. No threats or harassment of other users will be tolerated. Any instance of threatening or harassing behavior is grounds for deletion from the forums.

5. No profanity or pornography is allowed. Posts containing adult material will be deleted.

6. No re-posting of copyrighted materials or other illegal content is allowed. Any posts containing illegal content or copyrighted materials will be deleted.
See more
See less

Tool time.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • vital.spark
    replied
    I just ordered 2 CORONA RP81D 72mhz receivers for Ali. Just click on Sam's Henge receiver - Buy Henge receiver with free shipping on AliExpress and go to CORONA. They have over 40 left in stock and also have 40mhz available. I have used these in 3 of my Subs and they work like a champ! They are duel conversion and fully synthesized. 72mhz is legal here in Hong Kong and also New Zealand where I also operate.,

    Leave a comment:


  • Sam Victory
    replied
    Well, I do know that 75mhz is the only legel freq in Northern America. 72 mhz works well for rc submarines , but it seems unlawful if you use 72mhz for surface running as 72mhz is used for the aircrafts. Henge "RP82L" 8CH receiver is the crystal-free type , working pretty well for the rc models. You should notice that there are just a few stocks there.

    Henge receiver - Buy Henge receiver with free shipping on AliExpress

    V
    Last edited by Sam Victory; 03-11-2022, 03:48 AM.

    Leave a comment:


  • george
    replied
    Thanks Sam Victory, Now ALL I have to do is find one or two. ebay search has been activated, is there an exact corona synthesized model number to look for?

    I also wanted to ask anyone about the two corona receivers above, I googled both numbers and both ONLY list freq, upto 72mhz. How are they able to work where 75mhz is the legal freq. for surface and water use?
    Last edited by george; 03-11-2022, 01:16 AM.

    Leave a comment:


  • Sam Victory
    replied
    Originally posted by george View Post
    The Corona synthesized receivers will work with Futaba 75Mhz FM Dual Conversion TX crystals?
    According to this pic, it seems OK.

    V


    Click image for larger version

Name:	4fae0aff254a23366f4961ccc3a1fcc.jpg
Views:	82
Size:	80.0 KB
ID:	159836

    Leave a comment:


  • george
    replied
    The Corona synthesized receivers will work with Futaba 75Mhz FM Dual Conversion TX crystals?

    Leave a comment:


  • Sam Victory
    replied
    Corona receivers and Henge receivers are also great, with good interference immunity (dual conversion) . The most important thing is that they do not need crystals and can automatically search the frequency from the transmitter (for example, a 40mhz receiver can automatically match 40.67mhz or 40.35mhz or 40.78mhz etc.) The Henge receiver is very compatible and can match JR, WFLY, Futaba transmitters. Of course, both receivers can be set the “Failsafe” device.


    V


    Click image for larger version  Name:	coronarp8d140mhz8chreceiver01-01.jpg Views:	0 Size:	24.0 KB ID:	159791Click image for larger version  Name:	2008930185939552.jpg Views:	0 Size:	9.9 KB ID:	159790
    Last edited by Sam Victory; 03-08-2022, 08:26 PM.

    Leave a comment:


  • He Who Shall Not Be Named
    replied
    Originally posted by george View Post
    Those I guess can still be found in the 75Mhz FM range OR do they have to be converted by a service department?
    Only through after-market sources (rummage sales, estate sales, eBay, swap-meets, club contacts, etc.).

    Leave a comment:


  • george
    replied
    Those I guess can still be found in the 75Mhz FM range OR do they have to be converted by a service department?

    Leave a comment:


  • He Who Shall Not Be Named
    replied
    Originally posted by george View Post
    Is there a brand name 75mhz FM receiver better / more reliable than others? From your Wast Experience HWSNBN ?
    Futaba, Sombra, WFly Polk's are preferred.

    Click image for larger version

Name:	095.JPG
Views:	128
Size:	69.6 KB
ID:	159754Click image for larger version

Name:	DSCF3634.JPG
Views:	112
Size:	56.4 KB
ID:	159755

    I've had so-so success with these. A recent use of one of these was glitchy.

    Click image for larger version

Name:	IMG_0841.JPG
Views:	113
Size:	49.8 KB
ID:	159756

    Carona is another favorite, because of the synthetic crystal.

    David

    Leave a comment:


  • george
    replied
    Is there a brand name 75mhz FM receiver better / more reliable than others? From your Wast Experience HWSNBN ?

    Leave a comment:


  • He Who Shall Not Be Named
    replied
    Originally posted by Davidh View Post
    Hi David,

    No nothing. The pinch valve servo runs straight to the receiver. It is cramped inside the ZB cylinder and there's cables everywhere. I put a small toroid around the servo leads I don't know if this is helping. I am considering replacing the servo with a digital one..

    thanks

    David H
    Someone already suggested that your receiver is maybe sending out-of-place fail-safe commands. Get the documentation on that receiver and see if you can turn off any fail-safe features it may have. Or, replace the receiver and see what happens.

    A full 90-degree 'glitch' ain't a glitch -- something is commanding that. I think your receiver has gone evil on you, pal.

    David

    Leave a comment:


  • Davidh
    replied
    Hi David,

    No nothing. The pinch valve servo runs straight to the receiver. It is cramped inside the ZB cylinder and there's cables everywhere. I put a small toroid around the servo leads I don't know if this is helping. I am considering replacing the servo with a digital one..

    thanks

    David H

    Leave a comment:


  • He Who Shall Not Be Named
    replied
    Are there any 'devices' (angle-keeper, fail-safe, depth-keeper, servo reverser, etc.) between the servo lead and receiver?

    David

    Leave a comment:


  • JHapprich
    replied
    Ghz or corona receiver? I have one corona that had the failsafe enabled doing the same after not beeing used for one year.

    try another receiver. Try a digital servo for the pinch valve.

    My first ideas.

    Jörg
    Last edited by JHapprich; 03-06-2022, 04:48 AM.

    Leave a comment:


  • Davidh
    replied
    Hello all,

    I haven’t been here for a while, but have in the meantime been really frustrated by what I think may be an interference problem with a servo. This is mainly the servo that is used for the ballast tank pinch but has also happened to other.

    Every so often the servo arm will rotate 90 degrees in a direction ( I haven’t touched the sticks) and simply stay there, after a couple of minutes it may then move back to its neutral position. I try bring it back to neutral with stick movement and it simply ignores this.

    Does anybody have any idea why it does this?

    thanks

    david H

    Leave a comment:

Working...
X