This one-sided but keenly contested cup tie ended in a comfortable win for City who never quite came to terms with their windswept surroundings.
A blustery wind blowing end to end from the west dominated proceedings with City being driven on in the first period. Early chances came and went as Bangor forced a couple of corners, Les Davies fired over from the edge of the box and Clayton Blackmore repeated the feat minutes later after City's 19-year-old winger - playing up front alongside Paul Roberts - had his effort blocked.
Richard Acton was brought into action on eight minutes as Bleddyn Jones' freekick was deflected off the Bangor wall with home fans appealing for handball. Moments later City won a third corner which was cleared as far as Clayton Blackmore whose inch-perfect delivery found Mark Connolly but the industrious midfielder headed wide from six yards.
A fourth corner on 13 minutes was to prove unlucky for Pen. The kick came after the busy Tharme palmed over a much better header from Connolly which seemed destined for the net. From the corner Pen scrambled the ball clear to Clayton Blackmore, but the ice cool veteran sent a dipping cross shot over Tharme and into the net, right to left, to open the scoring.
With the wind at their backs Bangor were in total control and goalkeeper Jamie Tharme was working overtime to keep out Morgan Jones, Clayton Blackmore and then Mark Connolly. Paul Roberts then combined with Les Davies but sent his shot wide, Tharme saved well from Les Davies' clean strike from a Morgan Jones pullback. Tharme then saved well from Les Davies on the half hour who in turn combined well with Mark Connolly to set up Morgan Jones but the little winger had shis effort held.
Referee Harms then made a shocking decision as Paul Roberts charged clear and was clearly pulled down by the last man defender. With a freekick awarded - which acknowledged the offence - the Prestatyn official failed to produce any colour card.
From the kick Mark Connolly forced another good save from the Pheonix 'keeper, Bangor forced their sixth and seventh corners, with Mark Connolly again heading cleanly, but to no avail. As time ran out the home side won a second corner of their own but failed to trouble Richard Acton.
From the restart City played far more controlled football into the wind, with Eifion Jones and Phil Baker winning their headers and Paul Roberts showing better control upfront. City's top scorer nearly added to his tally in the opening minutes of the second period but Tharme again saved well, and moments later raced out the edge of his box to clutch the ball at Paul Roberts' feet with the defence trailing.
Mr Harms at last showed a modicum of sense with a long overdue yellow card for Number 7 John Crowl whose persistent fouling would have attracted the attention of a more diligent official. Ten minutes into the second half Paul Roberts controlled a good pass from Les Davies, but span and fired over from the edge of the box. A ninth corner arrived on the hour, courtesy of the hard working Les Davies, but Eifion Jones headed over. Three more flag kicks followed with the Llanrug centrehalf finally heading over once more to end the sequence.
With 25 minutes remaining a 13th corner saw Pen scramble the ball off the line to deny Les Davies. On 72 minutes it was 2-0 as Eifion Jones saw his header hit the bar, but Mark Connolly reacted first and rammed the ball home from close range for his first goal of the season. Crowl then showed a more creative side to his game by hitting a 40 yard volley which just skimmed the Bangor bar on its way out for a goalkick.
On 79 minutes manager Peter Davenport replaced Morgan Jones and Mark Connolly with substitutes Chris Short and Gary Parr, a move which meant Clayton Blackmore moved into midfield alongside mister perpetual motion Paul Friel.
The match was drifting towards the now inevitable conclusion when the luckless Gareth Evans left the field (to be replaced by Peter Hoy) with blood seeping from a headwound which saw him dash off to Bodelwyddan hospital at the final whistle. So a win at a price - the leftback is unlikely to feature at Newtown on Tuesday - but progress into the second round of the Welsh Cup.
A word of credit for the amazing Jamie Tharme who was Man of the Match for Pen, and centre forward Peter Williams who battled wholeheartedly throughout for little reward.
Report by Mike Smith
See Bangor City in the FAW Premier Cup at Newtown on BBC TV on Tuesday.