Runboard.com
You're welcome.
Community logo






runboard.com       Sign up (learn about it) | Sign in (lost password?)

 
stonecreator Profile
Live feed
Blog
Friends
Miscellaneous info

New Kid On The Block

Registered: 03-2012
Posts: 8
Karma: 0 (+0/-0)
Reply | Quote
Bremi BRL500 valve tube resistors


A new problem!!! does anyone know what WATT rating the 1k ohm resistors are on the bottom of the valve solder points on pcb??? i think they are metal film resistors, but that is it.
Also is there a definate cross reference for the EL509 and EL519 (definately not the 45s valve)

APOLOGIES first, as i put this on the wrong forum...i am looking for someone with experience of the brl500! Occasionally when i turn on my amp it goes with a thud when flicking the on switch, but also other times when turning it on there is no thud!! is there or isnt there a problem on startup??? Also i only use amp on ssb and again every now and again i blow the 20mm fuse in the back of the case, the one i use is 5amp fast blow. Does any one have any ideas on this situation or am i being to paranoid????

if someone with knowledge wants to communicate with me.
stonecreator@yahoo.com

Last edited by stonecreator, 20/Apr/2012, 4:31 pm
17/Mar/2012, 2:45 pm Link to this post Send Email to stonecreator   Send PM to stonecreator Blog
 
topbuzzuk Profile
Live feed
Blog
Friends
Miscellaneous info

Big Cheese

Registered: 11-2007
Location: Wiltshire, UK
Posts: 2645
Karma: 12 (+12/-0)
Reply | Quote
Re: Bremi BRL500


i had an old linear power supply that did that, sometimes would clunk really loud and even trip the main house fuse on the ring it was on. someone told me it needed a sotstrat board making up to fix this


---

27/Mar/2012, 7:16 pm Link to this post Send Email to topbuzzuk   Send PM to topbuzzuk Yahoo
 
Hot Fusion Profile
Live feed
Blog
Friends
Miscellaneous info

Management

Registered: 03-2008
Location: South West England
Posts: 1372
Karma: 7 (+7/-0)
Reply | Quote
Re: Bremi BRL500 valve tube resistors


Don't worry about the thud or clunk, that is simply the mains transformer magnetising or the first time.

Whether or not it makes a sound depends on what position in the mains waveform you actually switch the thing on. if the cycle happens to be at peak voltage then you'll get a hefty inrush of current at switch-on, causing the metal chassis to make a clunk due to the sudden magnetic atraction.

If the mains cycle happens to be near the zero crossing point, you'll get little or no sound.

Completely random, don't worry about it. emoticon

As for the wattage of the resistors, measure them and let us know the dimensions - wattage rating tends to be very closely related to physical size.

---
Andy - FB107
20/Apr/2012, 5:23 pm Link to this post Send Email to Hot Fusion   Send PM to Hot Fusion
 


Add a reply





You are not logged in (login)