Hello all,

Well in reading what is written in the Justradios web site regarding these resistors makes sense to me and flame proof sound like a great choice,but are they? or is there a lot more to it?

Well you guys here would know and I'm about to buy some for my radiogram and I would like to hear your thoughts or experienced witn these resistors. I'm still learning as I go along with my projects and I like to run things by you guys if I can please.
Thanks Pete

My thoughts on resistors is the ones readily available from Jaycar are probably as safe and reliable as you would need.
I might add don't use low watt resistors.

Be very careful with the Resistors from Jaycar. the 1/4w minis are not going to handle the 200 or so volts. they will arc over. the 1/2W ones are not bad but not recommended on the HT lines, I use then in a few selected areas...

The 1W resistors are OK and I haven't had one of them fail yet.... Yet....

I'll let Marc chime in because I learnt very early on with one of those told you so moments.....

Low wattage carbon film resistors are not suitable for valve radios.
JJ

Hi, I use Jaycar's 1 watt size resistors in all my VALVE experiments where the VOLTAGE rating is not exceeded. If the voltage creeps up a bit toward the 600 DC and over such as in a CRT circuit I tend to put 2 in series or use a bigger bodied type with the correct rating such as an older type. If the voltage arcs over a 1" long resistor you have other problems! In your average radio they are perfectly satisfactory.
I don't use the 1/2 watt Type in VALVE equipment because 1/ the voltage rating is too close and 2/ I cant read the colours! I don't use the "1/4" watt size because I cant see them at all and they go "pooooooooof" if surged by a fault! Those two last types are fine in 9 volt transistor circuits and amplifiers and stuff up to 100 volt, or, where you need 1 percenters and cant help using them.
VALVE circuits only need 10% accuracy so just use 1 watt carbon or wire wound where there is real current involved and inductance does not matter.
Buying resistors and capacitors from Jaycar is a very good idea as sales will encourage them to keep components in the catalogue.
Yes, I used to work at Jaycar head office and can confirm that sales of a product will help keep them in the catalogue.
Note they have 250VAC rated capacitors (700Vpp) that I have used for years in all sorts of electrical and electronics equipment and VALVE circuits in coupling and bypass functions at 400 volt DC with no problems.
Cheers, Fred.

I meant anything less than 1 watt carbon film resistors are unsuitable for valve radios.
JJ

I bought a big lot of metal oxide ones which seem good

Thank you all for replies and your experiences you've had with resistors for Radios and TVs

I was interested to know what your preferences were regarding Resistors in Valve units and I know some of you have many years experience up your sleeve and its great you have given your opinion.

From what I have read on Antique Radios and this site most people are using carbon film and as JJ pointed out nothing under 1W

There seems to be a growing number using Metal oxide and those people have found them to be reliable.

Carbon composite was also being used by many people still.

But the good thing was nobody had any horrifying stories of the Resistors going wrong becuse of their choice of Resistor.

Now Jaycar.
I have only bought their Capacitors for a TV I was working on .I have not bought their Resistors.

The Caps I bought were all fine ,just that I had to go elsewhere for the high voltage Caps.

All the best pete